/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:40:10,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:40:10,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:40:10,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:40:10,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:40:10,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:40:10,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:40:10,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:40:10,168 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:40:10,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:40:10,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:40:10,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:40:10,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:40:10,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:40:10,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:40:10,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:40:10,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:40:10,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:40:10,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:40:10,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:40:10,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:40:10,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:40:10,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:40:10,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:40:10,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:40:10,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:40:10,170 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:40:10,170 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:40:10,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:40:10,170 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:40:10,170 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:40:10,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:40:10,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:40:10,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:40:10,361 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:40:10,362 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:40:10,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-04-06 20:40:10,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e60a00fb/8c701eddaed94495b67006655c6e1eff/FLAG46461beca [2022-04-06 20:40:10,742 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:40:10,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-04-06 20:40:10,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e60a00fb/8c701eddaed94495b67006655c6e1eff/FLAG46461beca [2022-04-06 20:40:11,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e60a00fb/8c701eddaed94495b67006655c6e1eff [2022-04-06 20:40:11,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:40:11,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:40:11,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:40:11,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:40:11,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:40:11,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7734d1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11, skipping insertion in model container [2022-04-06 20:40:11,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:40:11,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:40:11,321 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-04-06 20:40:11,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:40:11,337 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:40:11,344 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-04-06 20:40:11,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:40:11,354 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:40:11,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11 WrapperNode [2022-04-06 20:40:11,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:40:11,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:40:11,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:40:11,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:40:11,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:40:11,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:40:11,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:40:11,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:40:11,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11" (1/1) ... [2022-04-06 20:40:11,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:40:11,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:11,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:40:11,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:40:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:40:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:40:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:40:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:40:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:40:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:40:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:40:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:40:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:40:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:40:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:40:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:40:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:40:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:40:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:40:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:40:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:40:11,466 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:40:11,467 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:40:11,552 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:40:11,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:40:11,556 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 20:40:11,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:40:11 BoogieIcfgContainer [2022-04-06 20:40:11,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:40:11,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:40:11,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:40:11,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:40:11,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:40:11" (1/3) ... [2022-04-06 20:40:11,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfa51e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:40:11, skipping insertion in model container [2022-04-06 20:40:11,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:11" (2/3) ... [2022-04-06 20:40:11,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfa51e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:40:11, skipping insertion in model container [2022-04-06 20:40:11,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:40:11" (3/3) ... [2022-04-06 20:40:11,575 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2022-04-06 20:40:11,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:40:11,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:40:11,629 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:40:11,634 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:40:11,634 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:40:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-04-06 20:40:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 20:40:11,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:11,647 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:11,648 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-04-06 20:40:11,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:11,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277096723] [2022-04-06 20:40:11,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:40:11,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 2 times [2022-04-06 20:40:11,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:11,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300822817] [2022-04-06 20:40:11,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:11,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:11,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:11,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:11,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300822817] [2022-04-06 20:40:11,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300822817] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:11,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:11,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:40:11,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:11,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277096723] [2022-04-06 20:40:11,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277096723] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:11,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:11,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:40:11,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892590622] [2022-04-06 20:40:11,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:11,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:40:11,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:11,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:40:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:40:11,871 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:11,917 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-04-06 20:40:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:40:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 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 12 [2022-04-06 20:40:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:11,925 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:40:11,925 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 20:40:11,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:40:11,932 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:11,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 20:40:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 20:40:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-04-06 20:40:11,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-04-06 20:40:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:11,964 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-04-06 20:40:11,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-04-06 20:40:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 20:40:11,964 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:11,964 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:11,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:40:11,965 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-04-06 20:40:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:11,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1388276754] [2022-04-06 20:40:11,969 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:40:11,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 2 times [2022-04-06 20:40:11,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:11,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401067128] [2022-04-06 20:40:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:11,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:12,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:12,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401067128] [2022-04-06 20:40:12,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401067128] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:40:12,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:12,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1388276754] [2022-04-06 20:40:12,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1388276754] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:40:12,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591424477] [2022-04-06 20:40:12,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:12,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:40:12,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:40:12,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:40:12,055 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:12,092 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-04-06 20:40:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:40:12,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 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 12 [2022-04-06 20:40:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:12,093 INFO L225 Difference]: With dead ends: 24 [2022-04-06 20:40:12,094 INFO L226 Difference]: Without dead ends: 16 [2022-04-06 20:40:12,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:40:12,096 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:12,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-06 20:40:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-06 20:40:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-04-06 20:40:12,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-04-06 20:40:12,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:12,110 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-04-06 20:40:12,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,110 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-04-06 20:40:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:40:12,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:12,111 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:12,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:40:12,111 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:12,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-04-06 20:40:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [956489587] [2022-04-06 20:40:12,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:12,125 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:12,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 2 times [2022-04-06 20:40:12,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:12,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705901376] [2022-04-06 20:40:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:12,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:12,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:12,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705901376] [2022-04-06 20:40:12,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705901376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:40:12,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [956489587] [2022-04-06 20:40:12,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [956489587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:40:12,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315839835] [2022-04-06 20:40:12,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:12,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:40:12,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:40:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:40:12,180 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-04-06 20:40:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:12,217 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-04-06 20:40:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:40:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2022-04-06 20:40:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:12,218 INFO L225 Difference]: With dead ends: 22 [2022-04-06 20:40:12,218 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:40:12,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:40:12,219 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:12,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:40:12,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:40:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 20:40:12,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-04-06 20:40:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:12,223 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 20:40:12,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-04-06 20:40:12,223 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 20:40:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:40:12,223 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:12,223 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:12,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:40:12,224 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2119154711, now seen corresponding path program 1 times [2022-04-06 20:40:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2105136006] [2022-04-06 20:40:12,225 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:12,225 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2119154711, now seen corresponding path program 2 times [2022-04-06 20:40:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:12,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446161920] [2022-04-06 20:40:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:12,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:12,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:12,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446161920] [2022-04-06 20:40:12,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446161920] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:12,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323104559] [2022-04-06 20:40:12,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:12,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:12,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:12,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:12,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:40:12,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:12,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:12,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 20:40:12,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:12,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:12,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323104559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:12,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:12,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 20:40:12,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:12,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2105136006] [2022-04-06 20:40:12,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2105136006] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:40:12,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647041171] [2022-04-06 20:40:12,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:12,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:40:12,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:40:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:40:12,452 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:12,493 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-06 20:40:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:40:12,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-04-06 20:40:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:12,494 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:40:12,494 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 20:40:12,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:40:12,495 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:12,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 20:40:12,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 20:40:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 20:40:12,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-04-06 20:40:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:12,499 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 20:40:12,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 20:40:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:40:12,499 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:12,499 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:12,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:12,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:12,706 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1483121146, now seen corresponding path program 3 times [2022-04-06 20:40:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1698477339] [2022-04-06 20:40:12,708 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:12,708 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1483121146, now seen corresponding path program 4 times [2022-04-06 20:40:12,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:12,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811172100] [2022-04-06 20:40:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:12,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:12,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811172100] [2022-04-06 20:40:12,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811172100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:40:12,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1698477339] [2022-04-06 20:40:12,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1698477339] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:40:12,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461317725] [2022-04-06 20:40:12,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:12,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:40:12,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:40:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:40:12,745 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2022-04-06 20:40:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:12,790 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-06 20:40:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:40:12,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 17 [2022-04-06 20:40:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:12,791 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:40:12,791 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 20:40:12,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:40:12,791 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:12,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 20:40:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-06 20:40:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-04-06 20:40:12,796 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-04-06 20:40:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:12,797 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-04-06 20:40:12,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2022-04-06 20:40:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-06 20:40:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:40:12,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:12,797 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:12,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 20:40:12,797 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:12,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:12,798 INFO L85 PathProgramCache]: Analyzing trace with hash -949567839, now seen corresponding path program 1 times [2022-04-06 20:40:12,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142700991] [2022-04-06 20:40:12,800 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:12,800 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:12,800 INFO L85 PathProgramCache]: Analyzing trace with hash -949567839, now seen corresponding path program 2 times [2022-04-06 20:40:12,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:12,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323526908] [2022-04-06 20:40:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:12,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:12,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:12,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323526908] [2022-04-06 20:40:12,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323526908] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:12,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543977992] [2022-04-06 20:40:12,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:12,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:12,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:12,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:12,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:40:12,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:12,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:12,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:40:12,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:12,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:12,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543977992] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:12,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:12,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:40:12,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:12,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142700991] [2022-04-06 20:40:12,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142700991] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:40:12,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326482965] [2022-04-06 20:40:13,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:13,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:40:13,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:40:13,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:40:13,001 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:13,049 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-04-06 20:40:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:40:13,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 20:40:13,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:13,051 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:40:13,051 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 20:40:13,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:40:13,054 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:13,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 26 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 20:40:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 20:40:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-04-06 20:40:13,065 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-04-06 20:40:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:13,066 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-04-06 20:40:13,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-04-06 20:40:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:40:13,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:13,067 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:13,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:13,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 20:40:13,279 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1087078974, now seen corresponding path program 3 times [2022-04-06 20:40:13,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [198948788] [2022-04-06 20:40:13,281 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:13,282 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:13,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1087078974, now seen corresponding path program 4 times [2022-04-06 20:40:13,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:13,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480063047] [2022-04-06 20:40:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:13,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:13,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:13,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480063047] [2022-04-06 20:40:13,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480063047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:13,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550989952] [2022-04-06 20:40:13,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:13,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:13,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:13,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:13,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:40:13,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:13,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:13,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:13,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:13,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550989952] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:13,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:13,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:40:13,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [198948788] [2022-04-06 20:40:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [198948788] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:13,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:13,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:40:13,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869813571] [2022-04-06 20:40:13,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:13,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:40:13,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:40:13,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:40:13,470 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:13,521 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-04-06 20:40:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:40:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 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 21 [2022-04-06 20:40:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:13,522 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:40:13,522 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 20:40:13,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:40:13,523 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:13,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 20:40:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 20:40:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-04-06 20:40:13,526 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2022-04-06 20:40:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:13,526 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-04-06 20:40:13,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:13,526 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-04-06 20:40:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:40:13,527 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:13,527 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:13,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:13,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:13,745 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:13,746 INFO L85 PathProgramCache]: Analyzing trace with hash -200420709, now seen corresponding path program 5 times [2022-04-06 20:40:13,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655891092] [2022-04-06 20:40:13,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:13,747 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash -200420709, now seen corresponding path program 6 times [2022-04-06 20:40:13,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599638328] [2022-04-06 20:40:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:13,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:13,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:13,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599638328] [2022-04-06 20:40:13,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599638328] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002041719] [2022-04-06 20:40:13,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:13,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:13,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:13,805 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:13,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:40:13,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:13,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:13,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:40:13,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:40:13,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002041719] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:13,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:13,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2022-04-06 20:40:13,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:13,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655891092] [2022-04-06 20:40:13,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655891092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:13,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:13,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:40:13,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058814617] [2022-04-06 20:40:13,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:13,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:40:13,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:40:13,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:40:13,966 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:14,020 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-04-06 20:40:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:40:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 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 23 [2022-04-06 20:40:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:14,022 INFO L225 Difference]: With dead ends: 36 [2022-04-06 20:40:14,022 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:40:14,022 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:40:14,022 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:14,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:40:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 20:40:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-04-06 20:40:14,026 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2022-04-06 20:40:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:14,026 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-04-06 20:40:14,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-04-06 20:40:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:40:14,026 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:14,027 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:14,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:14,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:14,239 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash -537034824, now seen corresponding path program 7 times [2022-04-06 20:40:14,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:14,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1275522433] [2022-04-06 20:40:14,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:14,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:14,241 INFO L85 PathProgramCache]: Analyzing trace with hash -537034824, now seen corresponding path program 8 times [2022-04-06 20:40:14,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:14,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131688666] [2022-04-06 20:40:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:14,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:14,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131688666] [2022-04-06 20:40:14,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131688666] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792714774] [2022-04-06 20:40:14,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:14,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:14,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:14,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:14,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:40:14,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:14,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:14,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:40:14,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:14,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:14,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792714774] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:14,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:14,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:40:14,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:14,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1275522433] [2022-04-06 20:40:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1275522433] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:14,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:14,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:40:14,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145207569] [2022-04-06 20:40:14,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:14,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:40:14,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:14,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:40:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:40:14,473 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:14,557 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-04-06 20:40:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:40:14,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 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 25 [2022-04-06 20:40:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:14,561 INFO L225 Difference]: With dead ends: 38 [2022-04-06 20:40:14,561 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:40:14,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:40:14,562 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:14,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:40:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 20:40:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-04-06 20:40:14,572 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2022-04-06 20:40:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:14,572 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-04-06 20:40:14,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:14,572 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-06 20:40:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:40:14,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:14,572 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:14,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:14,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:14,786 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:14,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1900652139, now seen corresponding path program 9 times [2022-04-06 20:40:14,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:14,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495641367] [2022-04-06 20:40:14,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:14,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1900652139, now seen corresponding path program 10 times [2022-04-06 20:40:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:14,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305811961] [2022-04-06 20:40:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:14,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:14,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305811961] [2022-04-06 20:40:14,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305811961] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:14,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230532770] [2022-04-06 20:40:14,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:14,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:14,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:14,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:14,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:40:14,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:40:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:14,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:15,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230532770] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:15,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:15,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:40:15,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:15,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495641367] [2022-04-06 20:40:15,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495641367] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:15,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:15,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:40:15,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443584240] [2022-04-06 20:40:15,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:15,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:40:15,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:15,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:40:15,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:40:15,033 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:15,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:15,123 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-04-06 20:40:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:40:15,124 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), 2 states have call successors, (3), 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 27 [2022-04-06 20:40:15,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:15,124 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:40:15,124 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 20:40:15,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:40:15,125 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:15,125 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 20:40:15,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 20:40:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-06 20:40:15,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2022-04-06 20:40:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:15,129 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-06 20:40:15,129 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-06 20:40:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:40:15,129 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:15,129 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:15,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:15,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:15,344 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:15,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1923100722, now seen corresponding path program 11 times [2022-04-06 20:40:15,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:15,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [246151082] [2022-04-06 20:40:15,349 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:15,349 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:15,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1923100722, now seen corresponding path program 12 times [2022-04-06 20:40:15,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:15,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471073301] [2022-04-06 20:40:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:15,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:15,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:15,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:15,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471073301] [2022-04-06 20:40:15,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471073301] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:15,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064518081] [2022-04-06 20:40:15,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:15,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:15,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:15,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:15,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:40:15,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:15,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:15,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:15,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064518081] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:15,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:15,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 15 [2022-04-06 20:40:15,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:15,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [246151082] [2022-04-06 20:40:15,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [246151082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:15,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:15,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:40:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662297778] [2022-04-06 20:40:15,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:15,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:40:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:40:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:40:15,632 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:15,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:15,717 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-04-06 20:40:15,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:40:15,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:40:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:15,718 INFO L225 Difference]: With dead ends: 42 [2022-04-06 20:40:15,718 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:40:15,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:40:15,718 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:15,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:40:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 20:40:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-04-06 20:40:15,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2022-04-06 20:40:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:15,722 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-04-06 20:40:15,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-04-06 20:40:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:40:15,723 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:15,723 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:15,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:15,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:15,943 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash 57594767, now seen corresponding path program 13 times [2022-04-06 20:40:15,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:15,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1281970558] [2022-04-06 20:40:15,945 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:15,945 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash 57594767, now seen corresponding path program 14 times [2022-04-06 20:40:15,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:15,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981081411] [2022-04-06 20:40:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:15,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:16,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:16,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981081411] [2022-04-06 20:40:16,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981081411] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733153480] [2022-04-06 20:40:16,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:16,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:16,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:16,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:16,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:40:16,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:16,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:16,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:40:16,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:16,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:16,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733153480] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:16,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:16,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:40:16,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1281970558] [2022-04-06 20:40:16,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1281970558] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:16,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:16,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:40:16,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411978949] [2022-04-06 20:40:16,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:16,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:40:16,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:40:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:40:16,220 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:16,323 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-04-06 20:40:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:40:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:40:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:16,324 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:40:16,324 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 20:40:16,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:40:16,325 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:16,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 20:40:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 20:40:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-04-06 20:40:16,329 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2022-04-06 20:40:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:16,329 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-04-06 20:40:16,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-04-06 20:40:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:40:16,342 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:16,342 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:16,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:16,542 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,SelfDestructingSolverStorable11 [2022-04-06 20:40:16,543 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:16,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1692265556, now seen corresponding path program 15 times [2022-04-06 20:40:16,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:16,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [31688927] [2022-04-06 20:40:16,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:16,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:16,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1692265556, now seen corresponding path program 16 times [2022-04-06 20:40:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:16,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759622876] [2022-04-06 20:40:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:16,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:16,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:16,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759622876] [2022-04-06 20:40:16,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759622876] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:16,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572326251] [2022-04-06 20:40:16,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:16,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:16,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:16,629 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:16,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:40:16,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:16,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:40:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:16,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:16,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572326251] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:16,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:16,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:40:16,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:16,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [31688927] [2022-04-06 20:40:16,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [31688927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:16,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:16,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:40:16,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168935458] [2022-04-06 20:40:16,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:16,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:40:16,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:16,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:40:16,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:40:16,855 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:16,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:16,945 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-04-06 20:40:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:40:16,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:40:16,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:16,946 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:40:16,946 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:40:16,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:40:16,947 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:16,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 31 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:40:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 20:40:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-04-06 20:40:16,951 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2022-04-06 20:40:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:16,951 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-04-06 20:40:16,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-04-06 20:40:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:40:16,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:16,951 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:16,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:17,152 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,SelfDestructingSolverStorable12 [2022-04-06 20:40:17,152 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash 319144073, now seen corresponding path program 17 times [2022-04-06 20:40:17,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:17,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1678753378] [2022-04-06 20:40:17,154 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:17,154 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:17,154 INFO L85 PathProgramCache]: Analyzing trace with hash 319144073, now seen corresponding path program 18 times [2022-04-06 20:40:17,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:17,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825013814] [2022-04-06 20:40:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:17,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:17,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:17,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:17,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825013814] [2022-04-06 20:40:17,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825013814] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:17,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194189044] [2022-04-06 20:40:17,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:17,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:17,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:17,249 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:17,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:40:17,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:17,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:17,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:40:17,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:40:17,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194189044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:17,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:17,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 4, 4] total 18 [2022-04-06 20:40:17,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:17,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1678753378] [2022-04-06 20:40:17,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1678753378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:17,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:17,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:40:17,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207260781] [2022-04-06 20:40:17,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:17,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:40:17,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:17,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:40:17,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:40:17,453 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:17,573 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-04-06 20:40:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:40:17,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:40:17,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:17,573 INFO L225 Difference]: With dead ends: 48 [2022-04-06 20:40:17,573 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:40:17,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:40:17,574 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:17,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:40:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 20:40:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-04-06 20:40:17,578 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2022-04-06 20:40:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:17,578 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-04-06 20:40:17,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-04-06 20:40:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:40:17,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:17,578 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:17,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:17,793 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,SelfDestructingSolverStorable13 [2022-04-06 20:40:17,794 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:17,794 INFO L85 PathProgramCache]: Analyzing trace with hash 548514342, now seen corresponding path program 19 times [2022-04-06 20:40:17,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:17,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [959958302] [2022-04-06 20:40:17,795 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:17,796 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash 548514342, now seen corresponding path program 20 times [2022-04-06 20:40:17,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:17,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025599136] [2022-04-06 20:40:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:17,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:17,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:17,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025599136] [2022-04-06 20:40:17,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025599136] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:17,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952749797] [2022-04-06 20:40:17,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:17,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:17,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:17,878 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:17,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:40:17,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:17,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:17,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:40:17,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:17,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:18,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952749797] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:18,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:18,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:40:18,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:18,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [959958302] [2022-04-06 20:40:18,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [959958302] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:18,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:18,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:40:18,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079222892] [2022-04-06 20:40:18,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:18,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:40:18,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:40:18,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:40:18,171 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:18,306 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-04-06 20:40:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:40:18,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:40:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:18,307 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:40:18,307 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:40:18,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:18,308 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:18,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:18,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:40:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 20:40:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-04-06 20:40:18,311 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-04-06 20:40:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:18,311 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-04-06 20:40:18,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:18,311 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-04-06 20:40:18,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:40:18,311 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:18,312 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:18,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:18,528 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,SelfDestructingSolverStorable14 [2022-04-06 20:40:18,528 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1930010755, now seen corresponding path program 21 times [2022-04-06 20:40:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:18,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111553050] [2022-04-06 20:40:18,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:18,530 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1930010755, now seen corresponding path program 22 times [2022-04-06 20:40:18,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:18,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243622965] [2022-04-06 20:40:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:18,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:18,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:18,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:18,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243622965] [2022-04-06 20:40:18,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243622965] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:18,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041990656] [2022-04-06 20:40:18,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:18,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:18,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:18,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:18,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:40:18,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:18,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:18,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:40:18,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:18,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:18,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041990656] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:18,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:18,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:40:18,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:18,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111553050] [2022-04-06 20:40:18,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111553050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:18,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:18,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:40:18,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676998184] [2022-04-06 20:40:18,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:18,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:40:18,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:40:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:40:18,935 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:19,071 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-04-06 20:40:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:40:19,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:40:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:19,072 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:40:19,072 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 20:40:19,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:40:19,073 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:19,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 20:40:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 20:40:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-04-06 20:40:19,076 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2022-04-06 20:40:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:19,077 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-04-06 20:40:19,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-04-06 20:40:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:40:19,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:19,077 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:19,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:19,291 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,SelfDestructingSolverStorable15 [2022-04-06 20:40:19,291 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1891798112, now seen corresponding path program 23 times [2022-04-06 20:40:19,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339828519] [2022-04-06 20:40:19,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:19,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1891798112, now seen corresponding path program 24 times [2022-04-06 20:40:19,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:19,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655080483] [2022-04-06 20:40:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:19,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:19,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655080483] [2022-04-06 20:40:19,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655080483] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337662748] [2022-04-06 20:40:19,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:19,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:19,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:19,417 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:19,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:40:19,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:19,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:19,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:19,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:40:19,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:40:19,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337662748] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:19,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:19,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 21 [2022-04-06 20:40:19,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:19,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339828519] [2022-04-06 20:40:19,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339828519] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:19,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:19,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:40:19,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135845588] [2022-04-06 20:40:19,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:19,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:40:19,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:40:19,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:40:19,627 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:19,780 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-04-06 20:40:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:40:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:40:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:19,781 INFO L225 Difference]: With dead ends: 54 [2022-04-06 20:40:19,781 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:40:19,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=816, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:40:19,782 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:19,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:40:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 20:40:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-04-06 20:40:19,785 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2022-04-06 20:40:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:19,785 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-04-06 20:40:19,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-04-06 20:40:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:40:19,786 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:19,786 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:19,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:19,995 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,SelfDestructingSolverStorable16 [2022-04-06 20:40:19,995 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1841886077, now seen corresponding path program 25 times [2022-04-06 20:40:19,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327247116] [2022-04-06 20:40:19,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:19,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1841886077, now seen corresponding path program 26 times [2022-04-06 20:40:19,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:19,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006408840] [2022-04-06 20:40:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:19,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:20,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:20,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:20,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006408840] [2022-04-06 20:40:20,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006408840] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:20,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280713968] [2022-04-06 20:40:20,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:20,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:20,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:20,118 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:20,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:40:20,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:20,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:20,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:40:20,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:20,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:20,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280713968] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:20,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:20,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:40:20,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:20,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327247116] [2022-04-06 20:40:20,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327247116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:20,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:20,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:40:20,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765000542] [2022-04-06 20:40:20,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:20,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:40:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:40:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:40:20,509 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:20,657 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-04-06 20:40:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:40:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:40:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:20,657 INFO L225 Difference]: With dead ends: 56 [2022-04-06 20:40:20,657 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:40:20,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:40:20,658 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:20,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:20,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:40:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 20:40:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-04-06 20:40:20,662 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2022-04-06 20:40:20,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:20,663 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-04-06 20:40:20,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:20,663 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-04-06 20:40:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:40:20,667 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:20,667 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:20,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:20,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:20,867 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash -680267750, now seen corresponding path program 27 times [2022-04-06 20:40:20,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:20,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [22339364] [2022-04-06 20:40:20,869 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:20,869 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash -680267750, now seen corresponding path program 28 times [2022-04-06 20:40:20,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:20,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669721799] [2022-04-06 20:40:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:20,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:20,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669721799] [2022-04-06 20:40:21,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669721799] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020771139] [2022-04-06 20:40:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:21,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:21,011 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:21,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:40:21,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:21,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:21,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:40:21,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:21,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:21,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020771139] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:21,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:21,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:40:21,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [22339364] [2022-04-06 20:40:21,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [22339364] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:21,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:21,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:40:21,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751556468] [2022-04-06 20:40:21,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:21,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:40:21,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:40:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:40:21,434 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:21,617 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-04-06 20:40:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:40:21,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:40:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:21,617 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:40:21,617 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 20:40:21,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:40:21,619 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:21,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 20:40:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 20:40:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-04-06 20:40:21,622 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2022-04-06 20:40:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:21,622 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-04-06 20:40:21,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-04-06 20:40:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:21,622 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:21,622 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:21,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:21,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:21,835 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2108540553, now seen corresponding path program 29 times [2022-04-06 20:40:21,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:21,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2087716972] [2022-04-06 20:40:21,837 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:21,837 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2108540553, now seen corresponding path program 30 times [2022-04-06 20:40:21,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:21,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275046528] [2022-04-06 20:40:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:21,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:21,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:21,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:21,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275046528] [2022-04-06 20:40:21,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275046528] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:21,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734172110] [2022-04-06 20:40:21,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:21,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:21,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:21,973 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:21,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:40:21,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:21,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:21,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 20:40:22,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 20:40:22,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734172110] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:22,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:22,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4, 4] total 24 [2022-04-06 20:40:22,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2087716972] [2022-04-06 20:40:22,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2087716972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:22,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:22,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:40:22,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523748107] [2022-04-06 20:40:22,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:22,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:40:22,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:22,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:40:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:40:22,224 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:22,437 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-04-06 20:40:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:40:22,437 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:40:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:22,438 INFO L225 Difference]: With dead ends: 60 [2022-04-06 20:40:22,438 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:40:22,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=527, Invalid=1113, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:40:22,439 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:22,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 36 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:40:22,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 20:40:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-04-06 20:40:22,442 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2022-04-06 20:40:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:22,442 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-04-06 20:40:22,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-04-06 20:40:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:40:22,442 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:22,442 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:22,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 20:40:22,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:22,651 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -289169516, now seen corresponding path program 31 times [2022-04-06 20:40:22,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:22,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1435901090] [2022-04-06 20:40:22,653 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:22,653 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash -289169516, now seen corresponding path program 32 times [2022-04-06 20:40:22,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:22,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797556119] [2022-04-06 20:40:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:22,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:22,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:22,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:22,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797556119] [2022-04-06 20:40:22,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797556119] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315118387] [2022-04-06 20:40:22,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:22,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:22,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:22,804 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:22,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:40:22,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:22,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:22,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:40:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:22,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:23,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315118387] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:23,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:23,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:40:23,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:23,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1435901090] [2022-04-06 20:40:23,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1435901090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:23,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:23,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:23,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041641627] [2022-04-06 20:40:23,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:23,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:23,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:23,288 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:23,486 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-04-06 20:40:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:40:23,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:40:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:23,487 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:40:23,488 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:40:23,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:40:23,489 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:23,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 26 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:40:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 20:40:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-04-06 20:40:23,492 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2022-04-06 20:40:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:23,492 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-04-06 20:40:23,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-04-06 20:40:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:40:23,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:23,492 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:23,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:23,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:23,716 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:23,717 INFO L85 PathProgramCache]: Analyzing trace with hash 74707569, now seen corresponding path program 33 times [2022-04-06 20:40:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:23,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263021581] [2022-04-06 20:40:23,718 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:23,718 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash 74707569, now seen corresponding path program 34 times [2022-04-06 20:40:23,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:23,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325861174] [2022-04-06 20:40:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:23,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:23,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:23,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:23,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325861174] [2022-04-06 20:40:23,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325861174] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:23,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924325054] [2022-04-06 20:40:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:23,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:23,867 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:23,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:40:23,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:23,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:40:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:23,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:24,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924325054] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:24,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:24,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:40:24,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:24,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263021581] [2022-04-06 20:40:24,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263021581] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:24,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:24,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:40:24,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051701110] [2022-04-06 20:40:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:24,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:40:24,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:40:24,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:40:24,339 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:24,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:24,572 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-04-06 20:40:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:40:24,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:40:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:24,574 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:40:24,574 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 20:40:24,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:40:24,575 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:24,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 46 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 20:40:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 20:40:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-04-06 20:40:24,579 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2022-04-06 20:40:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:24,579 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-04-06 20:40:24,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-04-06 20:40:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:40:24,579 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:24,579 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:24,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:24,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:24,780 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1868235278, now seen corresponding path program 35 times [2022-04-06 20:40:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [415727587] [2022-04-06 20:40:24,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:24,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1868235278, now seen corresponding path program 36 times [2022-04-06 20:40:24,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:24,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076133490] [2022-04-06 20:40:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:24,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:24,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076133490] [2022-04-06 20:40:24,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076133490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024773977] [2022-04-06 20:40:24,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:24,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:24,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:24,945 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:24,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:40:24,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:24,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:24,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 20:40:25,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 20:40:25,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024773977] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:25,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:25,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 4, 4] total 27 [2022-04-06 20:40:25,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:25,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [415727587] [2022-04-06 20:40:25,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [415727587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:25,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:25,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:40:25,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049254939] [2022-04-06 20:40:25,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:25,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:40:25,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:40:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:40:25,239 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:25,471 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2022-04-06 20:40:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:40:25,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:40:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:25,472 INFO L225 Difference]: With dead ends: 66 [2022-04-06 20:40:25,472 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:40:25,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:40:25,473 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:25,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 26 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:40:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 20:40:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-04-06 20:40:25,476 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2022-04-06 20:40:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:25,476 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-04-06 20:40:25,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-04-06 20:40:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:40:25,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:25,476 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:25,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:25,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:25,681 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1128489365, now seen corresponding path program 37 times [2022-04-06 20:40:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721081747] [2022-04-06 20:40:25,682 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:25,682 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1128489365, now seen corresponding path program 38 times [2022-04-06 20:40:25,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:25,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59091650] [2022-04-06 20:40:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:25,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:25,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:25,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:25,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59091650] [2022-04-06 20:40:25,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59091650] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:25,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226439536] [2022-04-06 20:40:25,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:25,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:25,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:25,866 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:25,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:40:25,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:40:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:26,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:26,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226439536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:26,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:26,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:40:26,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:26,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721081747] [2022-04-06 20:40:26,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721081747] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:26,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:26,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:40:26,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641693643] [2022-04-06 20:40:26,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:26,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:40:26,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:40:26,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:40:26,474 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:26,737 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-04-06 20:40:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:40:26,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 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 55 [2022-04-06 20:40:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:26,738 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:40:26,738 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:40:26,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:40:26,740 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:26,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:40:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 20:40:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-04-06 20:40:26,745 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2022-04-06 20:40:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:26,746 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-04-06 20:40:26,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-04-06 20:40:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:40:26,746 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:26,746 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:26,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:26,951 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,SelfDestructingSolverStorable23 [2022-04-06 20:40:26,951 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash 942184328, now seen corresponding path program 39 times [2022-04-06 20:40:26,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:26,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960140094] [2022-04-06 20:40:26,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:26,953 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:26,953 INFO L85 PathProgramCache]: Analyzing trace with hash 942184328, now seen corresponding path program 40 times [2022-04-06 20:40:26,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:26,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929902436] [2022-04-06 20:40:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:26,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:27,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929902436] [2022-04-06 20:40:27,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929902436] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861630220] [2022-04-06 20:40:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:27,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:27,162 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:27,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:40:27,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:27,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:27,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:40:27,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:27,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:27,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861630220] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:27,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:27,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:40:27,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:27,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960140094] [2022-04-06 20:40:27,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960140094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:27,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:27,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:40:27,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958516586] [2022-04-06 20:40:27,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:27,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:40:27,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:40:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:40:27,751 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:28,019 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2022-04-06 20:40:28,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:40:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 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 57 [2022-04-06 20:40:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:28,020 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:40:28,020 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 20:40:28,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:40:28,021 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:28,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 41 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 20:40:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-06 20:40:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-04-06 20:40:28,024 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2022-04-06 20:40:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:28,025 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-04-06 20:40:28,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-04-06 20:40:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:40:28,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:28,025 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:28,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:28,241 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,SelfDestructingSolverStorable24 [2022-04-06 20:40:28,241 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2005222043, now seen corresponding path program 41 times [2022-04-06 20:40:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:28,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [438606959] [2022-04-06 20:40:28,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:28,243 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:28,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2005222043, now seen corresponding path program 42 times [2022-04-06 20:40:28,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:28,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110129325] [2022-04-06 20:40:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:28,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:28,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:28,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:28,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110129325] [2022-04-06 20:40:28,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110129325] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:28,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243657974] [2022-04-06 20:40:28,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:28,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:28,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:28,454 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:28,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:40:28,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:28,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:28,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:28,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 20:40:28,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 20:40:28,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243657974] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:28,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:28,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 4, 4] total 30 [2022-04-06 20:40:28,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:28,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [438606959] [2022-04-06 20:40:28,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [438606959] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:28,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:28,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:40:28,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319155347] [2022-04-06 20:40:28,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:28,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:40:28,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:40:28,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:40:28,747 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:29,039 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-04-06 20:40:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:40:29,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:40:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:29,040 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:40:29,040 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:40:29,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=914, Invalid=1842, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:40:29,043 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:29,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 36 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:40:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-04-06 20:40:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-04-06 20:40:29,052 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2022-04-06 20:40:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:29,052 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-04-06 20:40:29,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-04-06 20:40:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:40:29,053 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:29,053 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:29,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:29,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:40:29,255 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 215670786, now seen corresponding path program 43 times [2022-04-06 20:40:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:29,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [434001017] [2022-04-06 20:40:29,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:29,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash 215670786, now seen corresponding path program 44 times [2022-04-06 20:40:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:29,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671303721] [2022-04-06 20:40:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:29,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:29,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671303721] [2022-04-06 20:40:29,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671303721] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:29,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655987189] [2022-04-06 20:40:29,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:29,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:29,505 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:29,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:40:29,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:29,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:29,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:40:29,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:29,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:30,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655987189] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:30,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:30,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:40:30,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:30,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [434001017] [2022-04-06 20:40:30,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [434001017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:30,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:30,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:40:30,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513878818] [2022-04-06 20:40:30,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:30,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:40:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:40:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:40:30,208 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:30,506 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-04-06 20:40:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:40:30,507 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 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 61 [2022-04-06 20:40:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:30,507 INFO L225 Difference]: With dead ends: 74 [2022-04-06 20:40:30,507 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:40:30,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:40:30,509 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:30,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:40:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-06 20:40:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-04-06 20:40:30,512 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2022-04-06 20:40:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:30,512 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-04-06 20:40:30,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-04-06 20:40:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:40:30,512 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:30,513 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:30,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:30,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:30,723 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash -105066657, now seen corresponding path program 45 times [2022-04-06 20:40:30,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:30,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [175150501] [2022-04-06 20:40:30,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:30,725 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:30,725 INFO L85 PathProgramCache]: Analyzing trace with hash -105066657, now seen corresponding path program 46 times [2022-04-06 20:40:30,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:30,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969722262] [2022-04-06 20:40:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:30,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:30,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:30,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969722262] [2022-04-06 20:40:30,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969722262] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929083144] [2022-04-06 20:40:30,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:30,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:30,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:30,991 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:30,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:40:31,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:31,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:40:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:31,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:31,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929083144] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:31,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:31,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:40:31,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:31,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [175150501] [2022-04-06 20:40:31,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [175150501] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:31,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:31,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:40:31,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073961659] [2022-04-06 20:40:31,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:31,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:40:31,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:31,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:40:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:40:31,748 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:32,107 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-04-06 20:40:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:40:32,107 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:40:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:32,108 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:40:32,108 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 20:40:32,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:40:32,109 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:32,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 36 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 20:40:32,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-04-06 20:40:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-04-06 20:40:32,112 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2022-04-06 20:40:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:32,112 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-04-06 20:40:32,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-04-06 20:40:32,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:40:32,113 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:32,113 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:32,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 20:40:32,313 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,SelfDestructingSolverStorable27 [2022-04-06 20:40:32,313 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:32,314 INFO L85 PathProgramCache]: Analyzing trace with hash 903895932, now seen corresponding path program 47 times [2022-04-06 20:40:32,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:32,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2683100] [2022-04-06 20:40:32,315 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:32,315 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash 903895932, now seen corresponding path program 48 times [2022-04-06 20:40:32,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:32,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687751285] [2022-04-06 20:40:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:32,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:32,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:32,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:32,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687751285] [2022-04-06 20:40:32,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687751285] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:32,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366792703] [2022-04-06 20:40:32,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:32,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:32,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:32,595 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:32,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:40:32,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:32,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:32,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:32,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 20:40:32,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 20:40:32,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366792703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:32,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:32,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4] total 33 [2022-04-06 20:40:32,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:32,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2683100] [2022-04-06 20:40:32,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2683100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:32,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:32,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:40:32,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53210546] [2022-04-06 20:40:32,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:32,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:40:32,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:32,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:40:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:40:32,942 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:33,295 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-04-06 20:40:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:40:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:40:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:33,296 INFO L225 Difference]: With dead ends: 78 [2022-04-06 20:40:33,296 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 20:40:33,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1148, Invalid=2274, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:40:33,297 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:33,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 36 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 20:40:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-04-06 20:40:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-04-06 20:40:33,300 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2022-04-06 20:40:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:33,300 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-04-06 20:40:33,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-04-06 20:40:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:40:33,301 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:33,301 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:33,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 20:40:33,507 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,SelfDestructingSolverStorable28 [2022-04-06 20:40:33,507 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash -145664935, now seen corresponding path program 49 times [2022-04-06 20:40:33,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:33,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1929555735] [2022-04-06 20:40:33,509 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:33,509 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash -145664935, now seen corresponding path program 50 times [2022-04-06 20:40:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954036999] [2022-04-06 20:40:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:33,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:33,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:33,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954036999] [2022-04-06 20:40:33,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954036999] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:33,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424602819] [2022-04-06 20:40:33,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:33,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:33,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:33,807 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:33,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:40:33,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:33,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:33,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:40:33,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:33,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:34,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424602819] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:34,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:34,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:40:34,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:34,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1929555735] [2022-04-06 20:40:34,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1929555735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:34,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:34,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:40:34,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328016548] [2022-04-06 20:40:34,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:34,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:40:34,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:40:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:40:34,671 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:35,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:35,029 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-04-06 20:40:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:40:35,029 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 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 67 [2022-04-06 20:40:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:35,029 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:40:35,029 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:40:35,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:40:35,031 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:35,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 46 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:40:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 20:40:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-04-06 20:40:35,034 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2022-04-06 20:40:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:35,034 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-04-06 20:40:35,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-04-06 20:40:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:40:35,035 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:35,035 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:35,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:35,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:35,250 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash 543656438, now seen corresponding path program 51 times [2022-04-06 20:40:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:35,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165491228] [2022-04-06 20:40:35,252 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:35,252 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash 543656438, now seen corresponding path program 52 times [2022-04-06 20:40:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392622081] [2022-04-06 20:40:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:35,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:35,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:35,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392622081] [2022-04-06 20:40:35,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392622081] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:35,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137696460] [2022-04-06 20:40:35,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:35,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:35,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:35,553 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:35,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:40:35,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:35,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:40:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:35,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:36,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137696460] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:36,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:36,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:40:36,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:36,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165491228] [2022-04-06 20:40:36,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165491228] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:36,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:36,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:40:36,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915964990] [2022-04-06 20:40:36,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:36,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:40:36,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:36,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:40:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:40:36,484 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:36,859 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-04-06 20:40:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:40:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:40:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:36,860 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:40:36,860 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:40:36,860 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:40:36,861 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:36,861 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 36 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:40:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-04-06 20:40:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-04-06 20:40:36,864 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2022-04-06 20:40:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:36,864 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-04-06 20:40:36,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-04-06 20:40:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:40:36,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:36,865 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:36,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 20:40:37,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:37,067 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:37,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:37,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1556532307, now seen corresponding path program 53 times [2022-04-06 20:40:37,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:37,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [518854100] [2022-04-06 20:40:37,069 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:37,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1556532307, now seen corresponding path program 54 times [2022-04-06 20:40:37,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:37,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683887778] [2022-04-06 20:40:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:37,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:37,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:37,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:37,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683887778] [2022-04-06 20:40:37,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683887778] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:37,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044369951] [2022-04-06 20:40:37,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:37,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:37,381 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:37,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:40:37,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:37,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:37,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:37,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 20:40:37,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 20:40:37,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044369951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:37,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:37,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 4, 4] total 36 [2022-04-06 20:40:37,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:37,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [518854100] [2022-04-06 20:40:37,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [518854100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:37,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:37,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:40:37,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49009558] [2022-04-06 20:40:37,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:37,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:40:37,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:40:37,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=779, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:40:37,749 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:38,170 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-04-06 20:40:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:40:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 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 71 [2022-04-06 20:40:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:38,171 INFO L225 Difference]: With dead ends: 84 [2022-04-06 20:40:38,171 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 20:40:38,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:40:38,172 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:38,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 36 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 20:40:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 20:40:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-04-06 20:40:38,185 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2022-04-06 20:40:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:38,185 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-04-06 20:40:38,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-04-06 20:40:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:40:38,185 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:38,185 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:38,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 20:40:38,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:38,386 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:38,386 INFO L85 PathProgramCache]: Analyzing trace with hash -27333776, now seen corresponding path program 55 times [2022-04-06 20:40:38,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:38,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [955940061] [2022-04-06 20:40:38,387 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:38,387 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash -27333776, now seen corresponding path program 56 times [2022-04-06 20:40:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:38,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865715985] [2022-04-06 20:40:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:38,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:38,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:38,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865715985] [2022-04-06 20:40:38,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865715985] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:38,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115974492] [2022-04-06 20:40:38,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:38,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:38,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:38,773 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:38,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:40:38,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:38,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:40:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:38,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:39,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115974492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:39,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:39,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:40:39,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [955940061] [2022-04-06 20:40:39,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [955940061] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:39,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:39,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:40:39,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797803150] [2022-04-06 20:40:39,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:39,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:40:39,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:39,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:40:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:40:39,735 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:40,206 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-04-06 20:40:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:40:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 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 73 [2022-04-06 20:40:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:40,207 INFO L225 Difference]: With dead ends: 86 [2022-04-06 20:40:40,207 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:40:40,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:40:40,209 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:40,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 46 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:40:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-04-06 20:40:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-04-06 20:40:40,212 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2022-04-06 20:40:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:40,212 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-04-06 20:40:40,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-04-06 20:40:40,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 20:40:40,212 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:40,213 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:40,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:40,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:40,423 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:40,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1704216755, now seen corresponding path program 57 times [2022-04-06 20:40:40,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:40,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [453693723] [2022-04-06 20:40:40,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:40,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1704216755, now seen corresponding path program 58 times [2022-04-06 20:40:40,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:40,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085541898] [2022-04-06 20:40:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:40,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:40,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:40,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:40,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085541898] [2022-04-06 20:40:40,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085541898] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:40,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218128447] [2022-04-06 20:40:40,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:40,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:40,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:40,773 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:40,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:40:40,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:40,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:40:40,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:40,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:41,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218128447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:41,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:41,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:40:41,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:41,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [453693723] [2022-04-06 20:40:41,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [453693723] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:41,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:41,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:40:41,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897106209] [2022-04-06 20:40:41,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:41,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:40:41,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:40:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:40:41,902 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:42,350 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2022-04-06 20:40:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:40:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 20:40:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:42,351 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:40:42,351 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 20:40:42,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:40:42,353 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:42,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 20:40:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-04-06 20:40:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-04-06 20:40:42,356 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2022-04-06 20:40:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:42,357 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-04-06 20:40:42,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-04-06 20:40:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:40:42,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:42,357 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:42,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 20:40:42,557 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,SelfDestructingSolverStorable33 [2022-04-06 20:40:42,558 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1718943722, now seen corresponding path program 59 times [2022-04-06 20:40:42,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:42,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1689788264] [2022-04-06 20:40:42,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:42,559 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:42,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1718943722, now seen corresponding path program 60 times [2022-04-06 20:40:42,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:42,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152333504] [2022-04-06 20:40:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:42,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:42,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:42,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152333504] [2022-04-06 20:40:42,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152333504] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357378986] [2022-04-06 20:40:42,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:42,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:42,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:42,906 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:42,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:40:42,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:42,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 20:40:43,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 20:40:43,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357378986] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:43,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:43,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 4, 4] total 39 [2022-04-06 20:40:43,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:43,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1689788264] [2022-04-06 20:40:43,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1689788264] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:43,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:43,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:40:43,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902524816] [2022-04-06 20:40:43,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:43,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:40:43,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:43,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:40:43,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=905, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:40:43,277 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:43,739 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-04-06 20:40:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:40:43,739 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 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 77 [2022-04-06 20:40:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:43,740 INFO L225 Difference]: With dead ends: 90 [2022-04-06 20:40:43,740 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:40:43,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1697, Invalid=3273, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:40:43,741 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:43,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 31 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:40:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-04-06 20:40:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-04-06 20:40:43,744 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2022-04-06 20:40:43,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:43,744 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-04-06 20:40:43,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-04-06 20:40:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 20:40:43,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:43,745 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:43,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 20:40:43,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:43,951 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:43,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1431213383, now seen corresponding path program 61 times [2022-04-06 20:40:43,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:43,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1174465736] [2022-04-06 20:40:43,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:43,953 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:43,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1431213383, now seen corresponding path program 62 times [2022-04-06 20:40:43,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:43,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508894164] [2022-04-06 20:40:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:43,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:44,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:44,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:44,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508894164] [2022-04-06 20:40:44,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508894164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:44,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501644492] [2022-04-06 20:40:44,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:44,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:44,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:44,315 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:44,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:40:44,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:44,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:40:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:44,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:45,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501644492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:45,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:45,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:40:45,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:45,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1174465736] [2022-04-06 20:40:45,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1174465736] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:45,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:45,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:40:45,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775424633] [2022-04-06 20:40:45,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:45,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:40:45,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:40:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:40:45,440 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:45,940 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2022-04-06 20:40:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:40:45,941 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 20:40:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:45,941 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:40:45,941 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:40:45,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4626, Invalid=5880, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:40:45,942 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:45,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 46 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:40:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-06 20:40:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-04-06 20:40:45,946 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2022-04-06 20:40:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:45,946 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-04-06 20:40:45,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-04-06 20:40:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 20:40:45,946 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:45,946 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:45,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:40:46,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:46,159 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash -199735452, now seen corresponding path program 63 times [2022-04-06 20:40:46,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:46,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180309360] [2022-04-06 20:40:46,161 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:46,161 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:46,161 INFO L85 PathProgramCache]: Analyzing trace with hash -199735452, now seen corresponding path program 64 times [2022-04-06 20:40:46,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:46,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160379466] [2022-04-06 20:40:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:46,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:46,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160379466] [2022-04-06 20:40:46,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160379466] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:46,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984759679] [2022-04-06 20:40:46,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:46,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:46,531 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:46,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:40:46,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:46,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:46,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:40:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:46,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:47,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984759679] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:47,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:47,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:40:47,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:47,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180309360] [2022-04-06 20:40:47,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180309360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:47,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:47,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:40:47,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255315140] [2022-04-06 20:40:47,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:47,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:40:47,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:40:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:40:47,723 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:48,244 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-04-06 20:40:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:40:48,245 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 20:40:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:48,245 INFO L225 Difference]: With dead ends: 94 [2022-04-06 20:40:48,245 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 20:40:48,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:40:48,247 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:48,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 31 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 20:40:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 20:40:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:48,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-04-06 20:40:48,250 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2022-04-06 20:40:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:48,251 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-04-06 20:40:48,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-04-06 20:40:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:40:48,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:48,251 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:48,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:48,455 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,SelfDestructingSolverStorable36 [2022-04-06 20:40:48,455 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:48,456 INFO L85 PathProgramCache]: Analyzing trace with hash 121497153, now seen corresponding path program 65 times [2022-04-06 20:40:48,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:48,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1192275604] [2022-04-06 20:40:48,457 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:48,457 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:48,457 INFO L85 PathProgramCache]: Analyzing trace with hash 121497153, now seen corresponding path program 66 times [2022-04-06 20:40:48,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:48,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463463700] [2022-04-06 20:40:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:48,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:48,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:48,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463463700] [2022-04-06 20:40:48,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463463700] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695537249] [2022-04-06 20:40:48,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:48,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:48,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:48,884 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:48,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:40:48,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:48,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:48,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:40:49,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:40:49,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695537249] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:49,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:49,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 4, 4] total 42 [2022-04-06 20:40:49,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:49,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1192275604] [2022-04-06 20:40:49,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1192275604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:49,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:49,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:40:49,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461271132] [2022-04-06 20:40:49,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:49,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:40:49,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:40:49,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=1040, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:40:49,299 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:49,841 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-04-06 20:40:49,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:40:49,842 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2022-04-06 20:40:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:49,842 INFO L225 Difference]: With dead ends: 96 [2022-04-06 20:40:49,842 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:40:49,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2012, Invalid=3840, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:40:49,843 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:49,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:40:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-06 20:40:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-04-06 20:40:49,855 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2022-04-06 20:40:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:49,855 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-04-06 20:40:49,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-04-06 20:40:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 20:40:49,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:49,855 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:49,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:50,063 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,SelfDestructingSolverStorable37 [2022-04-06 20:40:50,064 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:50,064 INFO L85 PathProgramCache]: Analyzing trace with hash -411614754, now seen corresponding path program 67 times [2022-04-06 20:40:50,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:50,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [620641634] [2022-04-06 20:40:50,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:50,065 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash -411614754, now seen corresponding path program 68 times [2022-04-06 20:40:50,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:50,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406341994] [2022-04-06 20:40:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:50,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:50,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:50,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:50,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406341994] [2022-04-06 20:40:50,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406341994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:50,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202708766] [2022-04-06 20:40:50,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:50,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:50,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:50,520 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:50,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:40:50,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:40:50,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:50,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:52,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202708766] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:52,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:52,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:40:52,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:52,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [620641634] [2022-04-06 20:40:52,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [620641634] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:52,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:52,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:40:52,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766926265] [2022-04-06 20:40:52,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:52,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:40:52,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:40:52,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:40:52,068 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:52,635 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-04-06 20:40:52,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:40:52,635 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 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 85 [2022-04-06 20:40:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:52,636 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:40:52,636 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 20:40:52,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5478, Invalid=6954, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:40:52,637 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:52,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 41 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 20:40:52,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-06 20:40:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-04-06 20:40:52,641 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2022-04-06 20:40:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:52,641 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-04-06 20:40:52,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-04-06 20:40:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 20:40:52,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:52,642 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:52,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:40:52,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:40:52,842 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:52,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1631049157, now seen corresponding path program 69 times [2022-04-06 20:40:52,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:52,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496707118] [2022-04-06 20:40:52,844 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:52,844 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:52,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1631049157, now seen corresponding path program 70 times [2022-04-06 20:40:52,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:52,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911186957] [2022-04-06 20:40:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:52,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:53,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911186957] [2022-04-06 20:40:53,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911186957] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46839390] [2022-04-06 20:40:53,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:53,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:53,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:53,308 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:53,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:40:53,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:53,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:53,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:40:53,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:53,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:54,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46839390] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:54,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:54,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 20:40:54,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496707118] [2022-04-06 20:40:54,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496707118] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:54,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:54,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:40:54,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710163723] [2022-04-06 20:40:54,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:54,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:40:54,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:40:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:40:54,676 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:55,244 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2022-04-06 20:40:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:40:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 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 87 [2022-04-06 20:40:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:55,245 INFO L225 Difference]: With dead ends: 100 [2022-04-06 20:40:55,245 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 20:40:55,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:40:55,246 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:55,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 36 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 20:40:55,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 20:40:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-04-06 20:40:55,250 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2022-04-06 20:40:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:55,250 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-04-06 20:40:55,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-04-06 20:40:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:40:55,250 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:55,251 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:55,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:55,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:40:55,451 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:55,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:55,451 INFO L85 PathProgramCache]: Analyzing trace with hash -981438632, now seen corresponding path program 71 times [2022-04-06 20:40:55,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:55,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1802011845] [2022-04-06 20:40:55,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:55,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash -981438632, now seen corresponding path program 72 times [2022-04-06 20:40:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:55,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24122926] [2022-04-06 20:40:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:55,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:55,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:55,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:55,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24122926] [2022-04-06 20:40:55,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24122926] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:55,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942050235] [2022-04-06 20:40:55,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:55,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:55,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:55,913 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:55,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:40:55,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:55,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:55,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:55,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:40:56,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:40:56,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942050235] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:56,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:56,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 4, 4] total 45 [2022-04-06 20:40:56,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:56,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1802011845] [2022-04-06 20:40:56,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1802011845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:56,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:56,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:40:56,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082759929] [2022-04-06 20:40:56,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:56,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:40:56,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:56,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:40:56,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:40:56,368 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:56,991 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2022-04-06 20:40:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:40:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2022-04-06 20:40:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:56,991 INFO L225 Difference]: With dead ends: 102 [2022-04-06 20:40:56,991 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:40:56,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2354, Invalid=4452, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:40:56,992 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:56,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 31 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:40:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-04-06 20:40:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-04-06 20:40:56,996 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2022-04-06 20:40:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:56,996 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-04-06 20:40:56,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-04-06 20:40:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 20:40:56,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:56,997 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:57,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:57,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:57,197 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash 524017973, now seen corresponding path program 73 times [2022-04-06 20:40:57,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:57,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226526048] [2022-04-06 20:40:57,199 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:57,199 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash 524017973, now seen corresponding path program 74 times [2022-04-06 20:40:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:57,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408935154] [2022-04-06 20:40:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:57,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:57,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:57,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:57,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408935154] [2022-04-06 20:40:57,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408935154] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:57,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398018867] [2022-04-06 20:40:57,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:57,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:57,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:57,701 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:57,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:40:57,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:57,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:57,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:40:57,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:57,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:59,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398018867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:59,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:59,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 20:40:59,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:59,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226526048] [2022-04-06 20:40:59,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226526048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:59,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:59,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:40:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319216966] [2022-04-06 20:40:59,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:59,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:40:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:40:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:40:59,208 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:59,835 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-04-06 20:40:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:40:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 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 91 [2022-04-06 20:40:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:59,836 INFO L225 Difference]: With dead ends: 104 [2022-04-06 20:40:59,836 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 20:40:59,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6402, Invalid=8118, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:40:59,837 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:59,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 26 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 20:40:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-04-06 20:40:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-04-06 20:40:59,842 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2022-04-06 20:40:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:59,842 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-04-06 20:40:59,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-04-06 20:40:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 20:40:59,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:59,843 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:59,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:00,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:41:00,058 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:00,058 INFO L85 PathProgramCache]: Analyzing trace with hash -136163374, now seen corresponding path program 75 times [2022-04-06 20:41:00,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:00,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2135139814] [2022-04-06 20:41:00,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:00,060 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash -136163374, now seen corresponding path program 76 times [2022-04-06 20:41:00,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:00,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760589310] [2022-04-06 20:41:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:00,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:00,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:00,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760589310] [2022-04-06 20:41:00,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760589310] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772153540] [2022-04-06 20:41:00,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:00,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:00,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:00,627 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:41:00,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:00,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:41:00,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:00,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:02,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772153540] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:02,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:02,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 20:41:02,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2135139814] [2022-04-06 20:41:02,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2135139814] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:02,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:02,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:41:02,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839963026] [2022-04-06 20:41:02,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:02,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:41:02,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:41:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:41:02,268 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:02,927 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-04-06 20:41:02,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:41:02,928 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 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 93 [2022-04-06 20:41:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:02,928 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:41:02,928 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 20:41:02,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:41:02,930 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:02,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 20:41:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-04-06 20:41:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-04-06 20:41:02,934 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2022-04-06 20:41:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:02,934 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-04-06 20:41:02,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-04-06 20:41:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:41:02,935 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:02,935 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:02,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 20:41:03,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 20:41:03,139 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1084721967, now seen corresponding path program 77 times [2022-04-06 20:41:03,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:03,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1288633255] [2022-04-06 20:41:03,141 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:03,141 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:03,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1084721967, now seen corresponding path program 78 times [2022-04-06 20:41:03,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:03,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821959493] [2022-04-06 20:41:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:03,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:03,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:03,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821959493] [2022-04-06 20:41:03,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821959493] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:03,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413686239] [2022-04-06 20:41:03,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:03,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:03,714 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:03,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:41:03,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:41:03,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:03,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:41:03,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 20:41:04,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 20:41:04,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413686239] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:04,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:04,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 4, 4] total 48 [2022-04-06 20:41:04,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:04,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1288633255] [2022-04-06 20:41:04,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1288633255] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:04,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:04,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:41:04,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225270696] [2022-04-06 20:41:04,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:04,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:41:04,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:04,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:41:04,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=1337, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:41:04,168 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:04,880 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2022-04-06 20:41:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:41:04,881 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2022-04-06 20:41:04,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:04,881 INFO L225 Difference]: With dead ends: 108 [2022-04-06 20:41:04,881 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 20:41:04,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2723, Invalid=5109, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:41:04,882 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:04,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 46 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 20:41:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-04-06 20:41:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-04-06 20:41:04,887 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2022-04-06 20:41:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:04,887 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-04-06 20:41:04,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-04-06 20:41:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 20:41:04,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:04,887 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:04,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 20:41:05,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 20:41:05,091 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1829462860, now seen corresponding path program 79 times [2022-04-06 20:41:05,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:05,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [793129043] [2022-04-06 20:41:05,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:05,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:05,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1829462860, now seen corresponding path program 80 times [2022-04-06 20:41:05,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:05,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276393985] [2022-04-06 20:41:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:05,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:05,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:05,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276393985] [2022-04-06 20:41:05,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276393985] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717561330] [2022-04-06 20:41:05,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:05,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:05,699 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:05,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:41:05,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:05,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:05,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:41:05,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:05,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:07,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717561330] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:07,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:07,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 20:41:07,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:07,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [793129043] [2022-04-06 20:41:07,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [793129043] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:07,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:07,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:41:07,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631008161] [2022-04-06 20:41:07,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:07,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:41:07,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:41:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:41:07,449 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:08,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:08,220 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2022-04-06 20:41:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:41:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 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 97 [2022-04-06 20:41:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:08,220 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:41:08,220 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:41:08,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:41:08,222 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:08,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:08,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:41:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 20:41:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-04-06 20:41:08,227 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2022-04-06 20:41:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:08,227 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-04-06 20:41:08,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-04-06 20:41:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 20:41:08,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:08,228 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:08,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:08,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:08,443 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash 265922601, now seen corresponding path program 81 times [2022-04-06 20:41:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:08,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [708473575] [2022-04-06 20:41:08,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:08,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash 265922601, now seen corresponding path program 82 times [2022-04-06 20:41:08,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:08,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827962370] [2022-04-06 20:41:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:08,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:09,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:09,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:09,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827962370] [2022-04-06 20:41:09,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827962370] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:09,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510331321] [2022-04-06 20:41:09,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:09,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:09,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:09,053 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:09,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:41:09,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:09,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:41:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:09,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:10,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510331321] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:10,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:10,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 20:41:10,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:10,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [708473575] [2022-04-06 20:41:10,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [708473575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:10,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:10,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:41:10,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627111445] [2022-04-06 20:41:10,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:10,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:41:10,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:10,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:41:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:41:10,880 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:11,648 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2022-04-06 20:41:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:41:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 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 99 [2022-04-06 20:41:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:11,649 INFO L225 Difference]: With dead ends: 112 [2022-04-06 20:41:11,649 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 20:41:11,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:41:11,650 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:11,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 31 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 20:41:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-06 20:41:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2022-04-06 20:41:11,655 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2022-04-06 20:41:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:11,655 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2022-04-06 20:41:11,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2022-04-06 20:41:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:41:11,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:11,655 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:11,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:11,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:11,864 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 942287302, now seen corresponding path program 83 times [2022-04-06 20:41:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:11,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963946752] [2022-04-06 20:41:11,865 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:11,866 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:11,866 INFO L85 PathProgramCache]: Analyzing trace with hash 942287302, now seen corresponding path program 84 times [2022-04-06 20:41:11,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:11,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944159042] [2022-04-06 20:41:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:11,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:12,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:12,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944159042] [2022-04-06 20:41:12,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944159042] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109916041] [2022-04-06 20:41:12,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:12,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:12,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:12,502 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:12,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:41:12,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:41:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:41:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 20:41:12,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 20:41:12,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109916041] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:12,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:12,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 4, 4] total 51 [2022-04-06 20:41:12,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:12,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963946752] [2022-04-06 20:41:12,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963946752] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:12,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:12,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:41:12,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703753780] [2022-04-06 20:41:12,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:12,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:41:12,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:12,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:41:12,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1051, Invalid=1499, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:41:12,999 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:13,798 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2022-04-06 20:41:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:41:13,798 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 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 101 [2022-04-06 20:41:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:13,799 INFO L225 Difference]: With dead ends: 114 [2022-04-06 20:41:13,799 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 20:41:13,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3119, Invalid=5811, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:41:13,800 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:13,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 36 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 20:41:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-04-06 20:41:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2022-04-06 20:41:13,809 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2022-04-06 20:41:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:13,809 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2022-04-06 20:41:13,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2022-04-06 20:41:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 20:41:13,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:13,810 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:13,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:14,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 20:41:14,023 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:14,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:14,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1906264029, now seen corresponding path program 85 times [2022-04-06 20:41:14,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:14,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272659790] [2022-04-06 20:41:14,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:14,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1906264029, now seen corresponding path program 86 times [2022-04-06 20:41:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:14,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210586439] [2022-04-06 20:41:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:14,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:14,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210586439] [2022-04-06 20:41:14,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210586439] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:14,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935783742] [2022-04-06 20:41:14,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:14,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:14,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:14,686 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:14,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:41:14,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:14,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:14,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:41:14,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:14,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2026 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:16,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935783742] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:16,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:16,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-06 20:41:16,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:16,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272659790] [2022-04-06 20:41:16,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272659790] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:16,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:16,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:41:16,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145274581] [2022-04-06 20:41:16,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:16,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:41:16,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:41:16,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:41:16,748 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:17,609 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-04-06 20:41:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:41:17,609 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 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 103 [2022-04-06 20:41:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:17,609 INFO L225 Difference]: With dead ends: 116 [2022-04-06 20:41:17,609 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 20:41:17,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8466, Invalid=10716, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:41:17,611 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:17,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 26 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 20:41:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-06 20:41:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2022-04-06 20:41:17,616 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2022-04-06 20:41:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:17,616 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2022-04-06 20:41:17,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2022-04-06 20:41:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 20:41:17,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:17,616 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:17,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:17,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 20:41:17,819 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash 825041728, now seen corresponding path program 87 times [2022-04-06 20:41:17,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:17,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [941047939] [2022-04-06 20:41:17,821 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:17,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:17,821 INFO L85 PathProgramCache]: Analyzing trace with hash 825041728, now seen corresponding path program 88 times [2022-04-06 20:41:17,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831921487] [2022-04-06 20:41:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:17,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:18,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:18,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831921487] [2022-04-06 20:41:18,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831921487] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:18,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606420031] [2022-04-06 20:41:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:18,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:18,503 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:18,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:41:18,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:18,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:18,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:41:18,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:18,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:20,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606420031] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:20,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:20,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-06 20:41:20,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:20,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [941047939] [2022-04-06 20:41:20,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [941047939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:20,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:20,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:41:20,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033239747] [2022-04-06 20:41:20,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:20,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:41:20,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:20,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:41:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:41:20,525 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:21,385 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2022-04-06 20:41:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:41:21,385 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 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 105 [2022-04-06 20:41:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:21,385 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:41:21,385 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 20:41:21,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:41:21,387 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:21,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 51 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 20:41:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-04-06 20:41:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-04-06 20:41:21,391 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2022-04-06 20:41:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:21,391 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-04-06 20:41:21,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-04-06 20:41:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:41:21,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:21,392 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:21,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 20:41:21,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 20:41:21,603 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1384856349, now seen corresponding path program 89 times [2022-04-06 20:41:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617478706] [2022-04-06 20:41:21,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:21,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:21,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1384856349, now seen corresponding path program 90 times [2022-04-06 20:41:21,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:21,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955899971] [2022-04-06 20:41:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:21,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:22,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:22,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:22,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955899971] [2022-04-06 20:41:22,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955899971] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:22,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979603688] [2022-04-06 20:41:22,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:22,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:22,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:22,307 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:22,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:41:22,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:41:22,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:22,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:41:22,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 20:41:22,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 20:41:22,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979603688] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:22,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:22,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 4, 4] total 54 [2022-04-06 20:41:22,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:22,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617478706] [2022-04-06 20:41:22,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617478706] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:22,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:22,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:41:22,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532407585] [2022-04-06 20:41:22,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:22,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:41:22,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:41:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=1670, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:41:22,799 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:23,705 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2022-04-06 20:41:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:41:23,706 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 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 107 [2022-04-06 20:41:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:23,706 INFO L225 Difference]: With dead ends: 120 [2022-04-06 20:41:23,706 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:41:23,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3542, Invalid=6558, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:41:23,707 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:23,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 36 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:41:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-04-06 20:41:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-04-06 20:41:23,711 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2022-04-06 20:41:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:23,712 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-04-06 20:41:23,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:23,712 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-04-06 20:41:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 20:41:23,712 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:23,712 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:23,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 20:41:23,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:23,915 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1799172166, now seen corresponding path program 91 times [2022-04-06 20:41:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:23,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1579215126] [2022-04-06 20:41:23,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:23,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1799172166, now seen corresponding path program 92 times [2022-04-06 20:41:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:23,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682760147] [2022-04-06 20:41:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:23,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:24,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:24,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:24,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682760147] [2022-04-06 20:41:24,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682760147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:24,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093601022] [2022-04-06 20:41:24,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:24,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:24,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:24,638 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:24,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:41:24,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:41:24,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:24,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093601022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:26,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:26,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-04-06 20:41:26,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:26,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1579215126] [2022-04-06 20:41:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1579215126] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:26,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:26,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:41:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873290653] [2022-04-06 20:41:26,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:26,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:41:26,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:41:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:41:26,879 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:27,814 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2022-04-06 20:41:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:41:27,815 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 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 109 [2022-04-06 20:41:27,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:27,815 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:41:27,816 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 20:41:27,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9606, Invalid=12150, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:41:27,817 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:27,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 46 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 20:41:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-04-06 20:41:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-04-06 20:41:27,821 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2022-04-06 20:41:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:27,821 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-04-06 20:41:27,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-04-06 20:41:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 20:41:27,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:27,822 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:27,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:28,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:28,031 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:28,032 INFO L85 PathProgramCache]: Analyzing trace with hash 661106967, now seen corresponding path program 93 times [2022-04-06 20:41:28,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:28,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067475387] [2022-04-06 20:41:28,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:28,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash 661106967, now seen corresponding path program 94 times [2022-04-06 20:41:28,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:28,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648475483] [2022-04-06 20:41:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:28,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:28,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2402 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:28,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:28,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648475483] [2022-04-06 20:41:28,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648475483] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:28,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473949251] [2022-04-06 20:41:28,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:28,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:28,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:28,774 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:28,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:41:28,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:28,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:28,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:41:28,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2402 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:28,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2402 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:31,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473949251] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:31,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:31,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 20:41:31,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:31,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067475387] [2022-04-06 20:41:31,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067475387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:31,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:31,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:41:31,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12896693] [2022-04-06 20:41:31,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:31,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:41:31,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:31,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:41:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:41:31,028 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:32,022 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2022-04-06 20:41:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:41:32,023 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 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 111 [2022-04-06 20:41:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:32,023 INFO L225 Difference]: With dead ends: 124 [2022-04-06 20:41:32,023 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 20:41:32,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:41:32,026 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:32,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 41 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 20:41:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-04-06 20:41:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2022-04-06 20:41:32,030 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2022-04-06 20:41:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:32,030 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2022-04-06 20:41:32,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,030 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2022-04-06 20:41:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:41:32,031 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:32,031 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:32,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:32,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:32,238 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:32,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:32,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1537626316, now seen corresponding path program 95 times [2022-04-06 20:41:32,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:32,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1359772037] [2022-04-06 20:41:32,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:32,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:32,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1537626316, now seen corresponding path program 96 times [2022-04-06 20:41:32,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:32,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098926251] [2022-04-06 20:41:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:32,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:32,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:32,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:32,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098926251] [2022-04-06 20:41:32,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098926251] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:32,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869885046] [2022-04-06 20:41:32,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:32,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:32,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:32,970 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:32,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:41:33,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:41:33,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:33,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:41:33,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:41:33,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:41:33,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869885046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:33,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:33,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 4, 4] total 57 [2022-04-06 20:41:33,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1359772037] [2022-04-06 20:41:33,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1359772037] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:33,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:33,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:41:33,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234291600] [2022-04-06 20:41:33,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:33,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:41:33,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:41:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=1850, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:41:33,504 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:34,506 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2022-04-06 20:41:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:41:34,506 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 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 113 [2022-04-06 20:41:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:34,506 INFO L225 Difference]: With dead ends: 126 [2022-04-06 20:41:34,506 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:41:34,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3992, Invalid=7350, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:41:34,508 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:34,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 26 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:41:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-04-06 20:41:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-04-06 20:41:34,512 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2022-04-06 20:41:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:34,513 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-04-06 20:41:34,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-04-06 20:41:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 20:41:34,513 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:34,513 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:34,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:34,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-06 20:41:34,723 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1396401647, now seen corresponding path program 97 times [2022-04-06 20:41:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [279359124] [2022-04-06 20:41:34,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:34,725 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1396401647, now seen corresponding path program 98 times [2022-04-06 20:41:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:34,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448487654] [2022-04-06 20:41:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:35,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:35,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:35,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448487654] [2022-04-06 20:41:35,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448487654] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:35,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646940533] [2022-04-06 20:41:35,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:35,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:35,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:35,526 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:35,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:41:35,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:35,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:35,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:41:35,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:35,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:38,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646940533] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:38,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:38,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-04-06 20:41:38,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:38,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [279359124] [2022-04-06 20:41:38,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [279359124] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:38,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:38,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:41:38,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185250309] [2022-04-06 20:41:38,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:38,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:41:38,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:38,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:41:38,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:41:38,016 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:38,987 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2022-04-06 20:41:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:41:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 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 115 [2022-04-06 20:41:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:38,988 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:41:38,988 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 20:41:38,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:41:38,991 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:38,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 31 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 20:41:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-04-06 20:41:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-04-06 20:41:39,001 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2022-04-06 20:41:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:39,001 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-04-06 20:41:39,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-04-06 20:41:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 20:41:39,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:39,002 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:39,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:39,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 20:41:39,217 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1176519086, now seen corresponding path program 99 times [2022-04-06 20:41:39,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:39,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1726866326] [2022-04-06 20:41:39,219 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:39,219 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1176519086, now seen corresponding path program 100 times [2022-04-06 20:41:39,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:39,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996661293] [2022-04-06 20:41:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:39,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:39,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:40,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:40,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996661293] [2022-04-06 20:41:40,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996661293] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:40,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727393017] [2022-04-06 20:41:40,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:40,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:40,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:40,009 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:40,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:41:40,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:40,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:40,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:41:40,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:40,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:42,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727393017] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:42,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:42,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 20:41:42,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1726866326] [2022-04-06 20:41:42,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1726866326] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:42,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:42,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:41:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90594864] [2022-04-06 20:41:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:42,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:41:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:41:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:41:42,581 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:43,669 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2022-04-06 20:41:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:41:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 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 117 [2022-04-06 20:41:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:43,670 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:41:43,670 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 20:41:43,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:41:43,672 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:43,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 46 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 20:41:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-04-06 20:41:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-04-06 20:41:43,676 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2022-04-06 20:41:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:43,676 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-04-06 20:41:43,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-04-06 20:41:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:41:43,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:43,677 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:43,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 20:41:43,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:43,891 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:43,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:43,892 INFO L85 PathProgramCache]: Analyzing trace with hash -147818997, now seen corresponding path program 101 times [2022-04-06 20:41:43,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:43,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282805226] [2022-04-06 20:41:43,893 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:43,893 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:43,893 INFO L85 PathProgramCache]: Analyzing trace with hash -147818997, now seen corresponding path program 102 times [2022-04-06 20:41:43,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:43,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718069378] [2022-04-06 20:41:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:43,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:44,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2810 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:44,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718069378] [2022-04-06 20:41:44,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718069378] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:44,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552897904] [2022-04-06 20:41:44,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:44,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:44,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:44,762 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:44,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:41:44,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:41:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:44,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:41:44,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2810 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 20:41:45,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2810 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 20:41:45,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552897904] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:45,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:45,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 4, 4] total 60 [2022-04-06 20:41:45,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:45,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282805226] [2022-04-06 20:41:45,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282805226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:45,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:45,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:41:45,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163117207] [2022-04-06 20:41:45,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:45,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:41:45,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:41:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1501, Invalid=2039, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:41:45,334 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:46,403 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2022-04-06 20:41:46,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:41:46,404 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 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 119 [2022-04-06 20:41:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:46,404 INFO L225 Difference]: With dead ends: 132 [2022-04-06 20:41:46,404 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:41:46,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4469, Invalid=8187, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:41:46,405 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:46,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 26 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:41:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-04-06 20:41:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2022-04-06 20:41:46,410 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2022-04-06 20:41:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:46,410 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2022-04-06 20:41:46,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2022-04-06 20:41:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 20:41:46,411 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:46,411 INFO L499 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:46,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 20:41:46,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-06 20:41:46,629 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:46,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1526397144, now seen corresponding path program 103 times [2022-04-06 20:41:46,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:46,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2138376590] [2022-04-06 20:41:46,630 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:46,630 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:46,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1526397144, now seen corresponding path program 104 times [2022-04-06 20:41:46,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:46,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250340590] [2022-04-06 20:41:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:46,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:47,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:47,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:47,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250340590] [2022-04-06 20:41:47,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250340590] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:47,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119003147] [2022-04-06 20:41:47,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:47,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:47,535 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:47,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:41:47,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:47,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:47,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:41:47,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:47,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:50,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119003147] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:50,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:50,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-04-06 20:41:50,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:50,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2138376590] [2022-04-06 20:41:50,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2138376590] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:50,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:50,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:41:50,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172714438] [2022-04-06 20:41:50,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:50,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:41:50,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:50,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:41:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:41:50,200 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:51,345 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2022-04-06 20:41:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:41:51,346 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 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 121 [2022-04-06 20:41:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:51,346 INFO L225 Difference]: With dead ends: 134 [2022-04-06 20:41:51,346 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 20:41:51,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:41:51,348 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:51,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 31 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 20:41:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-04-06 20:41:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-04-06 20:41:51,353 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 121 [2022-04-06 20:41:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:51,353 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-04-06 20:41:51,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-04-06 20:41:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 20:41:51,354 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:51,354 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:51,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:51,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-04-06 20:41:51,567 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:51,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash 804898053, now seen corresponding path program 105 times [2022-04-06 20:41:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:51,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107183182] [2022-04-06 20:41:51,568 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:51,568 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 804898053, now seen corresponding path program 106 times [2022-04-06 20:41:51,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:51,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677740745] [2022-04-06 20:41:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:52,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:52,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:52,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677740745] [2022-04-06 20:41:52,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677740745] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:52,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637886274] [2022-04-06 20:41:52,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:52,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:52,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:52,491 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:52,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:41:52,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:52,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:41:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:52,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:55,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637886274] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:55,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:55,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 20:41:55,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:55,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107183182] [2022-04-06 20:41:55,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107183182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:55,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:55,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:41:55,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388649596] [2022-04-06 20:41:55,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:55,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:41:55,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:41:55,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:41:55,233 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:56,386 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2022-04-06 20:41:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:41:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 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 123 [2022-04-06 20:41:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:56,387 INFO L225 Difference]: With dead ends: 136 [2022-04-06 20:41:56,387 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 20:41:56,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:41:56,388 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:56,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 46 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 20:41:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-04-06 20:41:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2022-04-06 20:41:56,393 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 123 [2022-04-06 20:41:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:56,393 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2022-04-06 20:41:56,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2022-04-06 20:41:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:41:56,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:56,394 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:56,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:56,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:56,599 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash -793346142, now seen corresponding path program 107 times [2022-04-06 20:41:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:56,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1301661055] [2022-04-06 20:41:56,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:56,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:56,601 INFO L85 PathProgramCache]: Analyzing trace with hash -793346142, now seen corresponding path program 108 times [2022-04-06 20:41:56,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:56,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564503817] [2022-04-06 20:41:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:56,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:57,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:57,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:57,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564503817] [2022-04-06 20:41:57,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564503817] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:57,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30691829] [2022-04-06 20:41:57,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:57,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:57,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:57,523 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:57,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:41:57,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:41:57,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:57,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:41:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 20:41:57,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 20:41:58,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30691829] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:58,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:58,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 4, 4] total 63 [2022-04-06 20:41:58,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:58,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1301661055] [2022-04-06 20:41:58,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1301661055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:58,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:58,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:41:58,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988886905] [2022-04-06 20:41:58,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:58,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:41:58,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:41:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1669, Invalid=2237, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:41:58,119 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:59,292 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2022-04-06 20:41:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:41:59,293 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 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 125 [2022-04-06 20:41:59,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:59,293 INFO L225 Difference]: With dead ends: 138 [2022-04-06 20:41:59,293 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:41:59,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4973, Invalid=9069, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:41:59,294 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:59,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 36 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:41:59,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:41:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-04-06 20:41:59,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-04-06 20:41:59,299 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2022-04-06 20:41:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:59,299 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-04-06 20:41:59,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-04-06 20:41:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 20:41:59,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:59,300 INFO L499 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:59,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 20:41:59,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:59,511 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:59,511 INFO L85 PathProgramCache]: Analyzing trace with hash 892274431, now seen corresponding path program 109 times [2022-04-06 20:41:59,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:59,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1817597766] [2022-04-06 20:41:59,512 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:59,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:59,512 INFO L85 PathProgramCache]: Analyzing trace with hash 892274431, now seen corresponding path program 110 times [2022-04-06 20:41:59,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:59,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342735335] [2022-04-06 20:41:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:59,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:00,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3250 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:00,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342735335] [2022-04-06 20:42:00,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342735335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252761655] [2022-04-06 20:42:00,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:00,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:00,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:00,463 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:00,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:42:00,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:00,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 20:42:00,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3250 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:00,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3250 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:03,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252761655] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:03,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:03,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-04-06 20:42:03,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:03,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1817597766] [2022-04-06 20:42:03,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1817597766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:03,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:03,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:42:03,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016266353] [2022-04-06 20:42:03,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:03,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:42:03,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:03,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:42:03,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:42:03,445 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:04,626 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2022-04-06 20:42:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:42:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 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 127 [2022-04-06 20:42:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:04,627 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:42:04,627 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 20:42:04,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:42:04,628 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:04,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 36 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 20:42:04,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-04-06 20:42:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-04-06 20:42:04,633 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 127 [2022-04-06 20:42:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:04,633 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-04-06 20:42:04,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-04-06 20:42:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 20:42:04,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:04,634 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:04,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:04,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:42:04,849 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1570974492, now seen corresponding path program 111 times [2022-04-06 20:42:04,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:04,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498839623] [2022-04-06 20:42:04,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:04,851 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1570974492, now seen corresponding path program 112 times [2022-04-06 20:42:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:04,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332585816] [2022-04-06 20:42:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:05,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3365 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:05,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:05,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332585816] [2022-04-06 20:42:05,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332585816] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:05,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595426319] [2022-04-06 20:42:05,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:05,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:05,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:05,821 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:05,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:42:05,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:05,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:42:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3365 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:06,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3365 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:08,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595426319] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:08,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:08,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 20:42:08,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:08,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498839623] [2022-04-06 20:42:08,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498839623] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:08,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:08,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:42:08,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858001561] [2022-04-06 20:42:08,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:08,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:42:08,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:08,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:42:08,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:42:08,910 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:10,159 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2022-04-06 20:42:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:42:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 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 129 [2022-04-06 20:42:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:10,160 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:42:10,160 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 20:42:10,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:42:10,161 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:10,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 26 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 20:42:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-04-06 20:42:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-04-06 20:42:10,166 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 129 [2022-04-06 20:42:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:10,166 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-04-06 20:42:10,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-04-06 20:42:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:42:10,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:10,167 INFO L499 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:10,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 20:42:10,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:10,382 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:10,382 INFO L85 PathProgramCache]: Analyzing trace with hash 966704121, now seen corresponding path program 113 times [2022-04-06 20:42:10,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:10,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [726440725] [2022-04-06 20:42:10,383 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:10,384 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash 966704121, now seen corresponding path program 114 times [2022-04-06 20:42:10,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:10,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416641953] [2022-04-06 20:42:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:10,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:11,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3482 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:11,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416641953] [2022-04-06 20:42:11,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416641953] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990312505] [2022-04-06 20:42:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:11,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:11,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:11,433 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:11,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:42:11,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:42:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:11,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:42:11,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3482 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 20:42:11,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3482 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 20:42:12,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990312505] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:12,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:12,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 4, 4] total 66 [2022-04-06 20:42:12,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:12,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [726440725] [2022-04-06 20:42:12,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [726440725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:12,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:12,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:42:12,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117225643] [2022-04-06 20:42:12,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:12,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:42:12,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:42:12,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=2444, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:42:12,046 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:13,363 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2022-04-06 20:42:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:42:13,364 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 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 131 [2022-04-06 20:42:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:13,364 INFO L225 Difference]: With dead ends: 144 [2022-04-06 20:42:13,364 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 20:42:13,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5504, Invalid=9996, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:42:13,366 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:13,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 46 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 20:42:13,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-04-06 20:42:13,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-04-06 20:42:13,379 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 131 [2022-04-06 20:42:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:13,379 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-04-06 20:42:13,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-04-06 20:42:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 20:42:13,380 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:13,380 INFO L499 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:13,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:13,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 20:42:13,595 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:13,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:13,596 INFO L85 PathProgramCache]: Analyzing trace with hash 83462550, now seen corresponding path program 115 times [2022-04-06 20:42:13,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:13,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1259414819] [2022-04-06 20:42:13,597 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:13,597 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:13,597 INFO L85 PathProgramCache]: Analyzing trace with hash 83462550, now seen corresponding path program 116 times [2022-04-06 20:42:13,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:13,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839177900] [2022-04-06 20:42:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:13,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:14,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:14,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839177900] [2022-04-06 20:42:14,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839177900] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:14,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327581195] [2022-04-06 20:42:14,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:14,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:14,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:14,665 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:14,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:42:14,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:14,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:42:14,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:14,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:17,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327581195] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:17,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:17,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-04-06 20:42:17,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:17,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1259414819] [2022-04-06 20:42:17,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1259414819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:17,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:17,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:42:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444652894] [2022-04-06 20:42:17,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:17,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:42:17,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:42:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:42:17,907 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:19,215 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2022-04-06 20:42:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:42:19,215 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 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 133 [2022-04-06 20:42:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:19,216 INFO L225 Difference]: With dead ends: 146 [2022-04-06 20:42:19,216 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 20:42:19,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14886, Invalid=18786, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:42:19,218 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:19,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 31 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 20:42:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-04-06 20:42:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-04-06 20:42:19,223 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 133 [2022-04-06 20:42:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:19,223 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-04-06 20:42:19,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-04-06 20:42:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 20:42:19,224 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:19,224 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:19,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:19,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-04-06 20:42:19,425 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1691837427, now seen corresponding path program 117 times [2022-04-06 20:42:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:19,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821875987] [2022-04-06 20:42:19,426 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:19,426 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1691837427, now seen corresponding path program 118 times [2022-04-06 20:42:19,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:19,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704293787] [2022-04-06 20:42:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:19,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3722 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:20,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:20,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704293787] [2022-04-06 20:42:20,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704293787] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:20,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631870427] [2022-04-06 20:42:20,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:20,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:20,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:20,484 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:20,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:42:20,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:20,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:42:20,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3722 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:20,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3722 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:23,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631870427] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:23,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:23,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-04-06 20:42:23,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:23,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821875987] [2022-04-06 20:42:23,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821875987] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:23,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:23,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:42:23,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231217451] [2022-04-06 20:42:23,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:23,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:42:23,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:42:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:42:23,927 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:25,277 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2022-04-06 20:42:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:42:25,277 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 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 135 [2022-04-06 20:42:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:25,278 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:42:25,278 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 20:42:25,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:42:25,281 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:25,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 31 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 20:42:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-04-06 20:42:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2022-04-06 20:42:25,291 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 135 [2022-04-06 20:42:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:25,291 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2022-04-06 20:42:25,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2022-04-06 20:42:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:42:25,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:25,292 INFO L499 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:25,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:25,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:25,495 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1151867664, now seen corresponding path program 119 times [2022-04-06 20:42:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:25,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1872659829] [2022-04-06 20:42:25,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:25,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1151867664, now seen corresponding path program 120 times [2022-04-06 20:42:25,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:25,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506260480] [2022-04-06 20:42:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:26,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:26,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:26,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506260480] [2022-04-06 20:42:26,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506260480] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:26,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432600123] [2022-04-06 20:42:26,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:26,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:26,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:26,632 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:26,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:42:26,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:42:26,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:42:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 20:42:27,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 20:42:27,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432600123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:27,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:27,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 4, 4] total 69 [2022-04-06 20:42:27,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1872659829] [2022-04-06 20:42:27,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1872659829] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:27,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:27,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:42:27,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134902336] [2022-04-06 20:42:27,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:27,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:42:27,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:42:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2032, Invalid=2660, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:42:27,286 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:28,723 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2022-04-06 20:42:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:42:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 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 137 [2022-04-06 20:42:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:28,724 INFO L225 Difference]: With dead ends: 150 [2022-04-06 20:42:28,724 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:42:28,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6062, Invalid=10968, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 20:42:28,725 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:28,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 56 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:42:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-04-06 20:42:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-04-06 20:42:28,736 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2022-04-06 20:42:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:28,736 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-04-06 20:42:28,736 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-04-06 20:42:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 20:42:28,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:28,737 INFO L499 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:28,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:28,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:28,937 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1931968237, now seen corresponding path program 121 times [2022-04-06 20:42:28,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:28,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329362904] [2022-04-06 20:42:28,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:28,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:28,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1931968237, now seen corresponding path program 122 times [2022-04-06 20:42:28,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:28,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041590751] [2022-04-06 20:42:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:28,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:30,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:30,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:30,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041590751] [2022-04-06 20:42:30,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041590751] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:30,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532413297] [2022-04-06 20:42:30,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:30,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:30,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:30,079 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:30,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:42:30,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:30,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:30,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:42:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:30,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:33,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532413297] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:33,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:33,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-04-06 20:42:33,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329362904] [2022-04-06 20:42:33,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329362904] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:33,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:33,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:42:33,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620223854] [2022-04-06 20:42:33,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:33,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:42:33,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:33,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:42:33,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:42:33,630 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:35,069 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2022-04-06 20:42:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:42:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 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 139 [2022-04-06 20:42:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:35,070 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:42:35,070 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 20:42:35,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:42:35,071 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:35,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 51 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 20:42:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-04-06 20:42:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-04-06 20:42:35,076 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 139 [2022-04-06 20:42:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:35,077 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-04-06 20:42:35,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-04-06 20:42:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 20:42:35,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:35,077 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:35,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:42:35,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-04-06 20:42:35,278 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:35,278 INFO L85 PathProgramCache]: Analyzing trace with hash -10657910, now seen corresponding path program 123 times [2022-04-06 20:42:35,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:35,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [602299866] [2022-04-06 20:42:35,279 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:35,279 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash -10657910, now seen corresponding path program 124 times [2022-04-06 20:42:35,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:35,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834901651] [2022-04-06 20:42:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:36,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:36,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:36,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834901651] [2022-04-06 20:42:36,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834901651] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:36,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137759620] [2022-04-06 20:42:36,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:36,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:36,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:36,486 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:36,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:42:36,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:36,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:42:36,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:36,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:40,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137759620] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:40,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:40,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-04-06 20:42:40,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [602299866] [2022-04-06 20:42:40,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [602299866] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:40,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:40,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:42:40,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648725974] [2022-04-06 20:42:40,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:40,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:42:40,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:42:40,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 20:42:40,115 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:41,586 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2022-04-06 20:42:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:42:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 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 141 [2022-04-06 20:42:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:41,587 INFO L225 Difference]: With dead ends: 154 [2022-04-06 20:42:41,587 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 20:42:41,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:42:41,589 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:41,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 46 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 20:42:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-04-06 20:42:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2022-04-06 20:42:41,598 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 141 [2022-04-06 20:42:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:41,598 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2022-04-06 20:42:41,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2022-04-06 20:42:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:42:41,599 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:41,599 INFO L499 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:41,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-06 20:42:41,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:42:41,806 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:41,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1436388583, now seen corresponding path program 125 times [2022-04-06 20:42:41,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:41,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [546130500] [2022-04-06 20:42:41,807 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:41,807 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1436388583, now seen corresponding path program 126 times [2022-04-06 20:42:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:41,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359440049] [2022-04-06 20:42:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:41,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:43,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4226 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:43,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:43,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359440049] [2022-04-06 20:42:43,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359440049] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:43,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899155751] [2022-04-06 20:42:43,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:43,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:43,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:43,058 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:43,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:42:43,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:42:43,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:42:43,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4226 backedges. 65 proven. 1 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 20:42:43,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4226 backedges. 65 proven. 1 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 20:42:43,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899155751] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:43,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:43,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 4, 4] total 72 [2022-04-06 20:42:43,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:43,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [546130500] [2022-04-06 20:42:43,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [546130500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:43,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:43,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:42:43,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710667982] [2022-04-06 20:42:43,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:43,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:42:43,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:43,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:42:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2227, Invalid=2885, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:42:43,751 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:45,282 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2022-04-06 20:42:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:42:45,282 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 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 143 [2022-04-06 20:42:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:45,283 INFO L225 Difference]: With dead ends: 156 [2022-04-06 20:42:45,283 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 20:42:45,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6647, Invalid=11985, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:42:45,284 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:45,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 46 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 20:42:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-04-06 20:42:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2022-04-06 20:42:45,290 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 143 [2022-04-06 20:42:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:45,290 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2022-04-06 20:42:45,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2022-04-06 20:42:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 20:42:45,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:45,290 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:45,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:45,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:45,499 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash 478664452, now seen corresponding path program 127 times [2022-04-06 20:42:45,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:45,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [564385917] [2022-04-06 20:42:45,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:45,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash 478664452, now seen corresponding path program 128 times [2022-04-06 20:42:45,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:45,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888740753] [2022-04-06 20:42:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:45,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:46,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4357 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:46,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:46,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888740753] [2022-04-06 20:42:46,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888740753] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:46,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807603873] [2022-04-06 20:42:46,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:46,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:46,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:46,750 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:46,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:42:46,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:46,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:42:46,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4357 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:46,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4357 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:50,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807603873] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:50,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:50,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-04-06 20:42:50,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:50,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [564385917] [2022-04-06 20:42:50,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [564385917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:50,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:50,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:42:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090953734] [2022-04-06 20:42:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:50,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:42:50,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:42:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:42:50,641 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:52,231 INFO L93 Difference]: Finished difference Result 158 states and 163 transitions. [2022-04-06 20:42:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:42:52,232 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 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 145 [2022-04-06 20:42:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:52,232 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:42:52,232 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 20:42:52,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=17958, Invalid=22644, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:42:52,235 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:52,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 36 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 20:42:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-04-06 20:42:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-04-06 20:42:52,240 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 145 [2022-04-06 20:42:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:52,240 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-04-06 20:42:52,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-04-06 20:42:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 20:42:52,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:52,241 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:52,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:52,448 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:42:52,448 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash -771224095, now seen corresponding path program 129 times [2022-04-06 20:42:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:52,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [345578167] [2022-04-06 20:42:52,450 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:52,450 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash -771224095, now seen corresponding path program 130 times [2022-04-06 20:42:52,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:52,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562490067] [2022-04-06 20:42:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:53,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4490 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:53,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:53,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562490067] [2022-04-06 20:42:53,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562490067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:53,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642043450] [2022-04-06 20:42:53,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:53,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:53,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:53,741 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:53,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:42:53,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:53,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:42:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4490 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:53,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4490 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:42:57,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642043450] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:57,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:57,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-04-06 20:42:57,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:57,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [345578167] [2022-04-06 20:42:57,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [345578167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:57,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:57,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:42:57,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194331377] [2022-04-06 20:42:57,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:57,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:42:57,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:57,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:42:57,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:42:57,719 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:59,331 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2022-04-06 20:42:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:42:59,332 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 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 147 [2022-04-06 20:42:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:59,332 INFO L225 Difference]: With dead ends: 160 [2022-04-06 20:42:59,332 INFO L226 Difference]: Without dead ends: 150 [2022-04-06 20:42:59,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 20:42:59,335 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:59,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 46 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:42:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-04-06 20:42:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-04-06 20:42:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:59,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2022-04-06 20:42:59,340 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 147 [2022-04-06 20:42:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:59,340 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2022-04-06 20:42:59,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2022-04-06 20:42:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:42:59,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:59,341 INFO L499 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:59,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-04-06 20:42:59,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:42:59,548 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:59,549 INFO L85 PathProgramCache]: Analyzing trace with hash 676725118, now seen corresponding path program 131 times [2022-04-06 20:42:59,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:59,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7173439] [2022-04-06 20:42:59,550 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:59,550 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash 676725118, now seen corresponding path program 132 times [2022-04-06 20:42:59,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:59,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403387293] [2022-04-06 20:42:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:00,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:00,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:00,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403387293] [2022-04-06 20:43:00,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403387293] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:00,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255630180] [2022-04-06 20:43:00,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:00,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:00,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:00,877 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:00,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:43:00,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:43:00,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:43:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 20:43:01,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 20:43:01,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255630180] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:01,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:01,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 4, 4] total 75 [2022-04-06 20:43:01,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:01,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7173439] [2022-04-06 20:43:01,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7173439] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:01,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:01,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:43:01,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124877721] [2022-04-06 20:43:01,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:01,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:43:01,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:43:01,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2431, Invalid=3119, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:43:01,577 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:03,208 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2022-04-06 20:43:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:43:03,209 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 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 149 [2022-04-06 20:43:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:03,209 INFO L225 Difference]: With dead ends: 162 [2022-04-06 20:43:03,209 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 20:43:03,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7259, Invalid=13047, Unknown=0, NotChecked=0, Total=20306 [2022-04-06 20:43:03,211 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:03,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 36 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:43:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 20:43:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-04-06 20:43:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2022-04-06 20:43:03,219 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 149 [2022-04-06 20:43:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:03,220 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2022-04-06 20:43:03,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2022-04-06 20:43:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 20:43:03,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:03,220 INFO L499 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:03,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 20:43:03,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:03,431 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash 586514907, now seen corresponding path program 133 times [2022-04-06 20:43:03,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:03,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1885970304] [2022-04-06 20:43:03,433 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:03,433 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash 586514907, now seen corresponding path program 134 times [2022-04-06 20:43:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:03,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172791091] [2022-04-06 20:43:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:04,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172791091] [2022-04-06 20:43:04,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172791091] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505699473] [2022-04-06 20:43:04,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:04,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:04,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:04,752 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:04,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:43:04,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:04,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 20:43:04,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:04,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:08,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505699473] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:08,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:08,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-04-06 20:43:08,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:08,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1885970304] [2022-04-06 20:43:08,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1885970304] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:08,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:08,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:43:08,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032669084] [2022-04-06 20:43:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:08,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:43:08,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:43:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:43:08,918 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:10,597 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2022-04-06 20:43:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:43:10,597 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 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 151 [2022-04-06 20:43:10,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:10,597 INFO L225 Difference]: With dead ends: 164 [2022-04-06 20:43:10,597 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 20:43:10,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=19602, Invalid=24708, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 20:43:10,599 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 79 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:10,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 46 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:43:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 20:43:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-04-06 20:43:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2022-04-06 20:43:10,605 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 151 [2022-04-06 20:43:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:10,605 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2022-04-06 20:43:10,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2022-04-06 20:43:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 20:43:10,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:10,605 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:10,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:10,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-04-06 20:43:10,806 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:10,806 INFO L85 PathProgramCache]: Analyzing trace with hash -206151944, now seen corresponding path program 135 times [2022-04-06 20:43:10,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:10,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1789810521] [2022-04-06 20:43:10,807 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:10,807 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:10,807 INFO L85 PathProgramCache]: Analyzing trace with hash -206151944, now seen corresponding path program 136 times [2022-04-06 20:43:10,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:10,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64670823] [2022-04-06 20:43:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:10,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:12,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64670823] [2022-04-06 20:43:12,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64670823] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437506990] [2022-04-06 20:43:12,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:12,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:12,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:12,170 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:12,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:43:12,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:12,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:43:12,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:12,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:16,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437506990] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:16,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:16,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-04-06 20:43:16,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:16,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1789810521] [2022-04-06 20:43:16,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1789810521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:16,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:16,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:43:16,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878747580] [2022-04-06 20:43:16,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:16,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:43:16,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:43:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 20:43:16,417 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:18,116 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2022-04-06 20:43:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:43:18,116 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 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 153 [2022-04-06 20:43:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:18,116 INFO L225 Difference]: With dead ends: 166 [2022-04-06 20:43:18,117 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 20:43:18,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 20:43:18,119 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 80 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:18,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 41 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:43:18,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 20:43:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-04-06 20:43:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 151 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-04-06 20:43:18,124 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 153 [2022-04-06 20:43:18,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:18,124 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-04-06 20:43:18,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-04-06 20:43:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:43:18,125 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:18,125 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:18,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 20:43:18,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:18,327 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1749784363, now seen corresponding path program 137 times [2022-04-06 20:43:18,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:18,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012247233] [2022-04-06 20:43:18,329 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:18,329 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:18,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1749784363, now seen corresponding path program 138 times [2022-04-06 20:43:18,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:18,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623542743] [2022-04-06 20:43:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:18,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:19,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5042 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:19,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:19,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623542743] [2022-04-06 20:43:19,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623542743] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:19,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822868589] [2022-04-06 20:43:19,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:19,713 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:19,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:43:19,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:43:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:43:19,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5042 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 20:43:20,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5042 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 20:43:20,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822868589] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:20,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:20,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 4, 4] total 78 [2022-04-06 20:43:20,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012247233] [2022-04-06 20:43:20,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012247233] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:20,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:20,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:43:20,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002927571] [2022-04-06 20:43:20,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:20,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:43:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:43:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2644, Invalid=3362, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:43:20,446 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:22,257 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2022-04-06 20:43:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:43:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 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 155 [2022-04-06 20:43:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:22,258 INFO L225 Difference]: With dead ends: 168 [2022-04-06 20:43:22,258 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 20:43:22,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7898, Invalid=14154, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:43:22,259 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:22,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 26 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:43:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 20:43:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-04-06 20:43:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0196078431372548) internal successors, (156), 153 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2022-04-06 20:43:22,264 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2022-04-06 20:43:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:22,264 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2022-04-06 20:43:22,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2022-04-06 20:43:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 20:43:22,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:22,265 INFO L499 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:22,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:22,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:22,475 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash 878145394, now seen corresponding path program 139 times [2022-04-06 20:43:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:22,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367653233] [2022-04-06 20:43:22,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:22,477 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:22,477 INFO L85 PathProgramCache]: Analyzing trace with hash 878145394, now seen corresponding path program 140 times [2022-04-06 20:43:22,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:22,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397907015] [2022-04-06 20:43:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:23,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:23,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:23,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397907015] [2022-04-06 20:43:23,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397907015] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:23,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923279247] [2022-04-06 20:43:23,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:23,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:23,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:23,903 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:23,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:43:23,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:23,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:23,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:43:23,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:24,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:28,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923279247] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:28,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:28,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-04-06 20:43:28,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367653233] [2022-04-06 20:43:28,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367653233] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:28,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:28,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:43:28,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812540487] [2022-04-06 20:43:28,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:28,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:43:28,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:43:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:43:28,368 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:30,148 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2022-04-06 20:43:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:43:30,148 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 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 157 [2022-04-06 20:43:30,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:30,149 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:43:30,149 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 20:43:30,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=21318, Invalid=26862, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 20:43:30,151 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:30,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 31 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:43:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 20:43:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-04-06 20:43:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-04-06 20:43:30,157 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 157 [2022-04-06 20:43:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:30,157 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-04-06 20:43:30,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-04-06 20:43:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 20:43:30,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:30,157 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:30,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 20:43:30,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:30,373 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash 877871823, now seen corresponding path program 141 times [2022-04-06 20:43:30,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:30,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2111869482] [2022-04-06 20:43:30,375 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:30,375 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash 877871823, now seen corresponding path program 142 times [2022-04-06 20:43:30,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:30,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543885979] [2022-04-06 20:43:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:30,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5330 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:31,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543885979] [2022-04-06 20:43:31,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543885979] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580082561] [2022-04-06 20:43:31,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:31,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:31,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:31,853 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:31,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:43:31,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:31,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 20:43:31,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5330 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:32,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5330 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:36,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580082561] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:36,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:36,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-04-06 20:43:36,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2111869482] [2022-04-06 20:43:36,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2111869482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:36,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:36,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:43:36,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72225200] [2022-04-06 20:43:36,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:36,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:43:36,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:43:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 20:43:36,476 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:38,322 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2022-04-06 20:43:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:43:38,322 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 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 159 [2022-04-06 20:43:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:38,323 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:43:38,323 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 20:43:38,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 20:43:38,325 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:38,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 41 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:43:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 20:43:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 20:43:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.019108280254777) internal successors, (160), 157 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2022-04-06 20:43:38,331 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 159 [2022-04-06 20:43:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:38,331 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2022-04-06 20:43:38,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2022-04-06 20:43:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:43:38,332 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:38,332 INFO L499 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:38,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:38,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-04-06 20:43:38,551 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash 614970092, now seen corresponding path program 143 times [2022-04-06 20:43:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109006390] [2022-04-06 20:43:38,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:38,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash 614970092, now seen corresponding path program 144 times [2022-04-06 20:43:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:38,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077120708] [2022-04-06 20:43:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:40,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5477 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:40,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:40,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077120708] [2022-04-06 20:43:40,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077120708] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040339650] [2022-04-06 20:43:40,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:40,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:40,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:40,064 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:40,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:43:40,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:43:40,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:43:40,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5477 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 20:43:40,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5477 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 20:43:40,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040339650] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:40,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:40,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 4, 4] total 81 [2022-04-06 20:43:40,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:40,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109006390] [2022-04-06 20:43:40,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109006390] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:40,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:40,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:43:40,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370227810] [2022-04-06 20:43:40,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:40,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:43:40,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:40,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:43:40,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2866, Invalid=3614, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:43:40,839 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:42,795 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2022-04-06 20:43:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:43:42,796 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 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 161 [2022-04-06 20:43:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:42,796 INFO L225 Difference]: With dead ends: 174 [2022-04-06 20:43:42,796 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 20:43:42,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8564, Invalid=15306, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 20:43:42,798 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:42,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 31 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:43:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 20:43:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-04-06 20:43:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-04-06 20:43:42,803 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2022-04-06 20:43:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:42,803 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-04-06 20:43:42,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-04-06 20:43:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 20:43:42,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:42,804 INFO L499 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:42,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:43,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:43,019 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1369477065, now seen corresponding path program 145 times [2022-04-06 20:43:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:43,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [54984962] [2022-04-06 20:43:43,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:43,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:43,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1369477065, now seen corresponding path program 146 times [2022-04-06 20:43:43,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:43,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131876262] [2022-04-06 20:43:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:43,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:44,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5626 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:44,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131876262] [2022-04-06 20:43:44,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131876262] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:44,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950521520] [2022-04-06 20:43:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:44,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:44,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:44,574 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:44,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:43:44,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:44,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 20:43:44,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5626 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:44,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5626 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:49,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950521520] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:49,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:49,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-04-06 20:43:49,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:49,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [54984962] [2022-04-06 20:43:49,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [54984962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:49,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:49,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:43:49,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032067136] [2022-04-06 20:43:49,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:49,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:43:49,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:43:49,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 20:43:49,427 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:51,391 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2022-04-06 20:43:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:43:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 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 163 [2022-04-06 20:43:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:51,392 INFO L225 Difference]: With dead ends: 176 [2022-04-06 20:43:51,392 INFO L226 Difference]: Without dead ends: 166 [2022-04-06 20:43:51,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=23106, Invalid=29106, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 20:43:51,395 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:51,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 46 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:43:51,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-04-06 20:43:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-04-06 20:43:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2022-04-06 20:43:51,400 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 163 [2022-04-06 20:43:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:51,401 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2022-04-06 20:43:51,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2022-04-06 20:43:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 20:43:51,401 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:51,401 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:51,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 20:43:51,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:51,602 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:51,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:51,602 INFO L85 PathProgramCache]: Analyzing trace with hash 601205094, now seen corresponding path program 147 times [2022-04-06 20:43:51,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:51,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1197095454] [2022-04-06 20:43:51,603 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:51,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:51,603 INFO L85 PathProgramCache]: Analyzing trace with hash 601205094, now seen corresponding path program 148 times [2022-04-06 20:43:51,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:51,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407394025] [2022-04-06 20:43:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:51,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:53,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5777 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:53,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407394025] [2022-04-06 20:43:53,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407394025] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244647928] [2022-04-06 20:43:53,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:53,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:53,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:53,231 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:53,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:43:53,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:53,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:43:53,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5777 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:53,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5777 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:43:58,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244647928] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:58,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:58,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-04-06 20:43:58,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:58,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1197095454] [2022-04-06 20:43:58,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1197095454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:58,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:58,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:43:58,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097663011] [2022-04-06 20:43:58,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:58,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:43:58,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:43:58,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 20:43:58,244 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:00,272 INFO L93 Difference]: Finished difference Result 178 states and 183 transitions. [2022-04-06 20:44:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:44:00,272 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 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 165 [2022-04-06 20:44:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:00,273 INFO L225 Difference]: With dead ends: 178 [2022-04-06 20:44:00,273 INFO L226 Difference]: Without dead ends: 168 [2022-04-06 20:44:00,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 20:44:00,275 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:00,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 46 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:00,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-06 20:44:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-04-06 20:44:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2022-04-06 20:44:00,290 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 165 [2022-04-06 20:44:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:00,290 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2022-04-06 20:44:00,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2022-04-06 20:44:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:44:00,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:00,291 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:00,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 20:44:00,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-04-06 20:44:00,492 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1026215875, now seen corresponding path program 149 times [2022-04-06 20:44:00,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:00,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [758863009] [2022-04-06 20:44:00,493 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:00,493 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:00,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1026215875, now seen corresponding path program 150 times [2022-04-06 20:44:00,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:00,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128361977] [2022-04-06 20:44:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:02,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:02,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:02,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128361977] [2022-04-06 20:44:02,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128361977] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:02,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400798657] [2022-04-06 20:44:02,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:02,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:02,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:02,174 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:02,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:44:02,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:02,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:02,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:44:02,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 77 proven. 1 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 20:44:02,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5930 backedges. 77 proven. 1 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 20:44:02,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400798657] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:02,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:02,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 4, 4] total 84 [2022-04-06 20:44:02,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:02,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [758863009] [2022-04-06 20:44:02,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [758863009] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:02,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:02,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:44:02,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424434915] [2022-04-06 20:44:02,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:02,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:44:02,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:02,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:44:02,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3097, Invalid=3875, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:44:02,945 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:05,009 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2022-04-06 20:44:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:44:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 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 167 [2022-04-06 20:44:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:05,010 INFO L225 Difference]: With dead ends: 180 [2022-04-06 20:44:05,010 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:44:05,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9257, Invalid=16503, Unknown=0, NotChecked=0, Total=25760 [2022-04-06 20:44:05,011 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:05,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 41 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:44:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-04-06 20:44:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2022-04-06 20:44:05,017 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 167 [2022-04-06 20:44:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:05,017 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2022-04-06 20:44:05,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2022-04-06 20:44:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 20:44:05,018 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:05,018 INFO L499 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:05,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:05,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-04-06 20:44:05,231 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1439683296, now seen corresponding path program 151 times [2022-04-06 20:44:05,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:05,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1218619578] [2022-04-06 20:44:05,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:05,233 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:05,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1439683296, now seen corresponding path program 152 times [2022-04-06 20:44:05,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:05,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807306194] [2022-04-06 20:44:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:05,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:06,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6085 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807306194] [2022-04-06 20:44:06,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807306194] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193131505] [2022-04-06 20:44:06,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:06,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:06,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:06,970 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:06,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:44:07,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:07,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:07,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:44:07,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6085 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:07,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6085 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:12,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193131505] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:12,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:12,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-04-06 20:44:12,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:12,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1218619578] [2022-04-06 20:44:12,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1218619578] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:12,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:12,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:44:12,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536374015] [2022-04-06 20:44:12,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:12,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:44:12,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:12,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:44:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:44:12,240 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:14,337 INFO L93 Difference]: Finished difference Result 182 states and 187 transitions. [2022-04-06 20:44:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:44:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 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 169 [2022-04-06 20:44:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:14,338 INFO L225 Difference]: With dead ends: 182 [2022-04-06 20:44:14,338 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 20:44:14,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=24966, Invalid=31440, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:44:14,340 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:14,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 41 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 20:44:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-04-06 20:44:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-04-06 20:44:14,347 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 169 [2022-04-06 20:44:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:14,347 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-04-06 20:44:14,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-04-06 20:44:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 20:44:14,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:14,348 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:14,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:14,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:14,557 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:14,557 INFO L85 PathProgramCache]: Analyzing trace with hash -650083651, now seen corresponding path program 153 times [2022-04-06 20:44:14,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:14,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1060905055] [2022-04-06 20:44:14,558 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:14,558 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:14,558 INFO L85 PathProgramCache]: Analyzing trace with hash -650083651, now seen corresponding path program 154 times [2022-04-06 20:44:14,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:14,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317286261] [2022-04-06 20:44:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:14,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:16,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6242 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:16,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317286261] [2022-04-06 20:44:16,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317286261] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:16,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313772850] [2022-04-06 20:44:16,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:16,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:16,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:16,283 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:16,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:44:16,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:16,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:16,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 20:44:16,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6242 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:16,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6242 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:21,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313772850] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:21,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:21,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-04-06 20:44:21,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:21,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1060905055] [2022-04-06 20:44:21,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1060905055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:21,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:21,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 20:44:21,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531332529] [2022-04-06 20:44:21,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:21,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 20:44:21,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:21,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 20:44:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 20:44:21,706 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:23,888 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2022-04-06 20:44:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:44:23,888 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 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 171 [2022-04-06 20:44:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:23,889 INFO L225 Difference]: With dead ends: 184 [2022-04-06 20:44:23,889 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 20:44:23,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 20:44:23,891 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:23,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 26 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 20:44:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-04-06 20:44:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.017751479289941) internal successors, (172), 169 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2022-04-06 20:44:23,897 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 171 [2022-04-06 20:44:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:23,897 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2022-04-06 20:44:23,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2022-04-06 20:44:23,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:44:23,898 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:23,898 INFO L499 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:23,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-06 20:44:24,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:24,111 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1128574810, now seen corresponding path program 155 times [2022-04-06 20:44:24,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:24,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1786180423] [2022-04-06 20:44:24,113 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:24,113 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:24,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1128574810, now seen corresponding path program 156 times [2022-04-06 20:44:24,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:24,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951001990] [2022-04-06 20:44:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:24,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:25,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6401 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:25,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:25,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951001990] [2022-04-06 20:44:25,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951001990] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159701196] [2022-04-06 20:44:25,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:25,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:25,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:25,878 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:25,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:44:25,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:25,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:25,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:44:25,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6401 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 20:44:26,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6401 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 20:44:26,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159701196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:26,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:26,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 4, 4] total 87 [2022-04-06 20:44:26,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:26,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1786180423] [2022-04-06 20:44:26,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1786180423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:26,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:26,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 20:44:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985098204] [2022-04-06 20:44:26,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:26,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 20:44:26,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 20:44:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3337, Invalid=4145, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:44:26,708 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:28,927 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2022-04-06 20:44:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:44:28,927 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 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 173 [2022-04-06 20:44:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:28,928 INFO L225 Difference]: With dead ends: 186 [2022-04-06 20:44:28,928 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 20:44:28,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9977, Invalid=17745, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 20:44:28,929 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:28,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 36 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 20:44:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-04-06 20:44:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2022-04-06 20:44:28,935 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2022-04-06 20:44:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:28,936 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2022-04-06 20:44:28,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2022-04-06 20:44:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 20:44:28,936 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:28,936 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:28,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:29,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-04-06 20:44:29,151 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1022372023, now seen corresponding path program 157 times [2022-04-06 20:44:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:29,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1660695053] [2022-04-06 20:44:29,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:29,153 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:29,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1022372023, now seen corresponding path program 158 times [2022-04-06 20:44:29,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:29,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829665659] [2022-04-06 20:44:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:29,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:30,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:30,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:30,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829665659] [2022-04-06 20:44:30,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829665659] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:30,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793121840] [2022-04-06 20:44:30,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:30,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:30,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:30,953 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:30,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:44:31,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:31,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 20:44:31,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:31,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:36,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793121840] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:36,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:36,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-04-06 20:44:36,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1660695053] [2022-04-06 20:44:36,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1660695053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:36,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:36,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 20:44:36,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496858880] [2022-04-06 20:44:36,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:36,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 20:44:36,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 20:44:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:44:36,576 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:38,797 INFO L93 Difference]: Finished difference Result 188 states and 193 transitions. [2022-04-06 20:44:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 20:44:38,797 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 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 175 [2022-04-06 20:44:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:38,798 INFO L225 Difference]: With dead ends: 188 [2022-04-06 20:44:38,798 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 20:44:38,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=26898, Invalid=33864, Unknown=0, NotChecked=0, Total=60762 [2022-04-06 20:44:38,801 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:38,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 31 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 20:44:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-04-06 20:44:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0173410404624277) internal successors, (176), 173 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2022-04-06 20:44:38,807 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 175 [2022-04-06 20:44:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:38,807 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2022-04-06 20:44:38,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2022-04-06 20:44:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 20:44:38,807 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:38,808 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:38,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 20:44:39,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:39,008 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:39,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2040708820, now seen corresponding path program 159 times [2022-04-06 20:44:39,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:39,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834929270] [2022-04-06 20:44:39,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:39,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:39,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2040708820, now seen corresponding path program 160 times [2022-04-06 20:44:39,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:39,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328098471] [2022-04-06 20:44:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:39,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:40,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:40,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:40,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328098471] [2022-04-06 20:44:40,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328098471] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:40,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890699934] [2022-04-06 20:44:40,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:40,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:40,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:40,854 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:40,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:44:40,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:40,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:40,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:44:40,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:41,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:46,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890699934] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:46,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:46,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-04-06 20:44:46,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:46,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834929270] [2022-04-06 20:44:46,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834929270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:46,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:46,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 20:44:46,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34955429] [2022-04-06 20:44:46,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:46,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 20:44:46,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:46,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 20:44:46,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 20:44:46,624 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:48,917 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2022-04-06 20:44:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 20:44:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 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 177 [2022-04-06 20:44:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:48,918 INFO L225 Difference]: With dead ends: 190 [2022-04-06 20:44:48,918 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 20:44:48,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 20:44:48,920 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:48,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 51 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 20:44:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-04-06 20:44:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0171428571428571) internal successors, (178), 175 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2022-04-06 20:44:48,926 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 177 [2022-04-06 20:44:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:48,926 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2022-04-06 20:44:48,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2022-04-06 20:44:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:44:48,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:48,927 INFO L499 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:48,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:49,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:49,127 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1409827249, now seen corresponding path program 161 times [2022-04-06 20:44:49,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:49,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082798467] [2022-04-06 20:44:49,128 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:49,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:49,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1409827249, now seen corresponding path program 162 times [2022-04-06 20:44:49,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:49,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772920718] [2022-04-06 20:44:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:49,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:51,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:51,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:51,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772920718] [2022-04-06 20:44:51,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772920718] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:51,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331167696] [2022-04-06 20:44:51,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:51,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:51,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:51,023 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:51,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:44:51,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:51,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:44:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 20:44:51,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 20:44:51,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331167696] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:51,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:51,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 4, 4] total 90 [2022-04-06 20:44:51,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082798467] [2022-04-06 20:44:51,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082798467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:51,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:51,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 20:44:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409870] [2022-04-06 20:44:51,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:51,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 20:44:51,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:51,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 20:44:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3586, Invalid=4424, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:44:51,852 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:54,246 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2022-04-06 20:44:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 20:44:54,246 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 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 179 [2022-04-06 20:44:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:54,247 INFO L225 Difference]: With dead ends: 192 [2022-04-06 20:44:54,247 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 20:44:54,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10724, Invalid=19032, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 20:44:54,249 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:54,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:44:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 20:44:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-04-06 20:44:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0169491525423728) internal successors, (180), 177 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2022-04-06 20:44:54,256 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2022-04-06 20:44:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:54,256 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2022-04-06 20:44:54,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2022-04-06 20:44:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 20:44:54,257 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:54,257 INFO L499 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:54,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:54,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-04-06 20:44:54,457 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash 723026254, now seen corresponding path program 163 times [2022-04-06 20:44:54,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:54,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1169009283] [2022-04-06 20:44:54,458 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:54,459 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:54,459 INFO L85 PathProgramCache]: Analyzing trace with hash 723026254, now seen corresponding path program 164 times [2022-04-06 20:44:54,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:54,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874159494] [2022-04-06 20:44:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:56,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7057 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:56,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:56,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874159494] [2022-04-06 20:44:56,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874159494] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:56,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025710821] [2022-04-06 20:44:56,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:56,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:56,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:56,417 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:56,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:44:56,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:56,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:56,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:44:56,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7057 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:44:56,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7057 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:02,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025710821] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:02,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:02,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-04-06 20:45:02,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:02,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1169009283] [2022-04-06 20:45:02,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1169009283] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:02,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:02,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 20:45:02,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634202999] [2022-04-06 20:45:02,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:02,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 20:45:02,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 20:45:02,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 20:45:02,484 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:04,905 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2022-04-06 20:45:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:45:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 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 181 [2022-04-06 20:45:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:04,906 INFO L225 Difference]: With dead ends: 194 [2022-04-06 20:45:04,906 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 20:45:04,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=28902, Invalid=36378, Unknown=0, NotChecked=0, Total=65280 [2022-04-06 20:45:04,908 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 94 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:04,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 26 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 20:45:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-04-06 20:45:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2022-04-06 20:45:04,914 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 181 [2022-04-06 20:45:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:04,915 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2022-04-06 20:45:04,915 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2022-04-06 20:45:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 20:45:04,915 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:04,915 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:04,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:05,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:05,131 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2132233643, now seen corresponding path program 165 times [2022-04-06 20:45:05,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:05,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [796141592] [2022-04-06 20:45:05,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:05,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:05,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2132233643, now seen corresponding path program 166 times [2022-04-06 20:45:05,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:05,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849408657] [2022-04-06 20:45:05,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:05,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:07,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7226 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:07,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:07,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849408657] [2022-04-06 20:45:07,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849408657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:07,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86909316] [2022-04-06 20:45:07,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:07,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:07,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:07,212 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:07,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:45:07,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:07,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:07,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 20:45:07,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7226 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:07,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7226 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:13,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86909316] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:13,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:13,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-04-06 20:45:13,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [796141592] [2022-04-06 20:45:13,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [796141592] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:13,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:13,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 20:45:13,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555333178] [2022-04-06 20:45:13,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:13,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 20:45:13,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 20:45:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 20:45:13,399 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:15,867 INFO L93 Difference]: Finished difference Result 196 states and 201 transitions. [2022-04-06 20:45:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 20:45:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 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 183 [2022-04-06 20:45:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:15,868 INFO L225 Difference]: With dead ends: 196 [2022-04-06 20:45:15,868 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 20:45:15,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 20:45:15,871 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:15,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 61 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 20:45:15,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-04-06 20:45:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0165745856353592) internal successors, (184), 181 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2022-04-06 20:45:15,879 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 183 [2022-04-06 20:45:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:15,879 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2022-04-06 20:45:15,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2022-04-06 20:45:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:45:15,880 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:15,880 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:15,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 20:45:16,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:16,091 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash -829131064, now seen corresponding path program 167 times [2022-04-06 20:45:16,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:16,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [516968892] [2022-04-06 20:45:16,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:16,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash -829131064, now seen corresponding path program 168 times [2022-04-06 20:45:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:16,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187509643] [2022-04-06 20:45:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:16,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:18,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7397 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:18,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187509643] [2022-04-06 20:45:18,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187509643] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515667351] [2022-04-06 20:45:18,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:18,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:18,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:18,113 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:18,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:45:18,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:18,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:45:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7397 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 20:45:18,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7397 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 20:45:18,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515667351] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:18,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:18,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 4, 4] total 93 [2022-04-06 20:45:18,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [516968892] [2022-04-06 20:45:18,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [516968892] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:18,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:18,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 20:45:18,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482707153] [2022-04-06 20:45:18,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:18,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 20:45:18,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 20:45:18,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3844, Invalid=4712, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:45:18,969 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:21,510 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2022-04-06 20:45:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 20:45:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 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 185 [2022-04-06 20:45:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:21,511 INFO L225 Difference]: With dead ends: 198 [2022-04-06 20:45:21,511 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 20:45:21,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11498, Invalid=20364, Unknown=0, NotChecked=0, Total=31862 [2022-04-06 20:45:21,513 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:21,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 46 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 20:45:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-04-06 20:45:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 183 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2022-04-06 20:45:21,538 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 185 [2022-04-06 20:45:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:21,538 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2022-04-06 20:45:21,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2022-04-06 20:45:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 20:45:21,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:21,539 INFO L499 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:21,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:21,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-04-06 20:45:21,747 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash 862702757, now seen corresponding path program 169 times [2022-04-06 20:45:21,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934395338] [2022-04-06 20:45:21,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:21,749 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash 862702757, now seen corresponding path program 170 times [2022-04-06 20:45:21,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:21,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757345490] [2022-04-06 20:45:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:21,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:23,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7570 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:23,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:23,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757345490] [2022-04-06 20:45:23,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757345490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:23,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928046199] [2022-04-06 20:45:23,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:23,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:23,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:23,854 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:23,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:45:23,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:23,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 20:45:23,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7570 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:24,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7570 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:30,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928046199] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:30,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:30,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-04-06 20:45:30,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:30,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934395338] [2022-04-06 20:45:30,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934395338] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:30,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:30,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 20:45:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656023008] [2022-04-06 20:45:30,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:30,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 20:45:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:30,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 20:45:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:45:30,342 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:32,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:32,906 INFO L93 Difference]: Finished difference Result 200 states and 205 transitions. [2022-04-06 20:45:32,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 20:45:32,907 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 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 187 [2022-04-06 20:45:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:32,907 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:45:32,907 INFO L226 Difference]: Without dead ends: 190 [2022-04-06 20:45:32,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=30978, Invalid=38982, Unknown=0, NotChecked=0, Total=69960 [2022-04-06 20:45:32,910 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 97 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:32,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 46 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-04-06 20:45:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-04-06 20:45:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0162162162162163) internal successors, (188), 185 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2022-04-06 20:45:32,916 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 187 [2022-04-06 20:45:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:32,916 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2022-04-06 20:45:32,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2022-04-06 20:45:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 20:45:32,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:32,917 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:32,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:33,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:33,118 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1077600446, now seen corresponding path program 171 times [2022-04-06 20:45:33,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:33,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690052562] [2022-04-06 20:45:33,119 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:33,119 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:33,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1077600446, now seen corresponding path program 172 times [2022-04-06 20:45:33,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:33,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624799673] [2022-04-06 20:45:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:33,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7745 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:35,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624799673] [2022-04-06 20:45:35,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624799673] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939798585] [2022-04-06 20:45:35,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:35,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:35,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:35,261 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:35,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:45:35,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:35,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:45:35,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7745 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:35,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7745 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:42,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939798585] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:42,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:42,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-04-06 20:45:42,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690052562] [2022-04-06 20:45:42,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690052562] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:42,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:42,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 20:45:42,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344349312] [2022-04-06 20:45:42,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:42,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 20:45:42,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:42,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 20:45:42,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 20:45:42,005 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:44,657 INFO L93 Difference]: Finished difference Result 202 states and 207 transitions. [2022-04-06 20:45:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 20:45:44,657 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 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 189 [2022-04-06 20:45:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:44,658 INFO L225 Difference]: With dead ends: 202 [2022-04-06 20:45:44,658 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 20:45:44,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 20:45:44,661 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:44,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 56 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 20:45:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-04-06 20:45:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2022-04-06 20:45:44,667 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 189 [2022-04-06 20:45:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:44,667 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2022-04-06 20:45:44,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2022-04-06 20:45:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:45:44,668 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:44,668 INFO L499 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:44,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 20:45:44,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:44,868 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1693172065, now seen corresponding path program 173 times [2022-04-06 20:45:44,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:44,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2127498236] [2022-04-06 20:45:44,869 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:44,870 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:44,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1693172065, now seen corresponding path program 174 times [2022-04-06 20:45:44,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:44,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148972375] [2022-04-06 20:45:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:44,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:47,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7922 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:47,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:47,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148972375] [2022-04-06 20:45:47,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148972375] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:47,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383509371] [2022-04-06 20:45:47,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:47,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:47,047 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:47,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:45:47,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:47,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:45:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7922 backedges. 89 proven. 1 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 20:45:47,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7922 backedges. 89 proven. 1 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 20:45:47,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383509371] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:47,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:47,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 4, 4] total 96 [2022-04-06 20:45:47,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:47,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2127498236] [2022-04-06 20:45:47,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2127498236] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:47,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:47,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 20:45:47,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811156438] [2022-04-06 20:45:47,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:47,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 20:45:47,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:47,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 20:45:47,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4111, Invalid=5009, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:45:47,920 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:50,620 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2022-04-06 20:45:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 20:45:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 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 191 [2022-04-06 20:45:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:50,621 INFO L225 Difference]: With dead ends: 204 [2022-04-06 20:45:50,621 INFO L226 Difference]: Without dead ends: 194 [2022-04-06 20:45:50,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12299, Invalid=21741, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 20:45:50,623 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 99 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:50,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 46 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-04-06 20:45:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-04-06 20:45:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0158730158730158) internal successors, (192), 189 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2022-04-06 20:45:50,629 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2022-04-06 20:45:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:50,629 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2022-04-06 20:45:50,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2022-04-06 20:45:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 20:45:50,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:50,636 INFO L499 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:50,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 20:45:50,836 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:50,837 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash -552011076, now seen corresponding path program 175 times [2022-04-06 20:45:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:50,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012625914] [2022-04-06 20:45:50,838 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:50,838 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:50,838 INFO L85 PathProgramCache]: Analyzing trace with hash -552011076, now seen corresponding path program 176 times [2022-04-06 20:45:50,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:50,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725867546] [2022-04-06 20:45:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:50,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:53,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8101 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:53,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:53,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725867546] [2022-04-06 20:45:53,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725867546] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:53,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808352474] [2022-04-06 20:45:53,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:53,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:53,062 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:53,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:45:53,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:53,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:53,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:45:53,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8101 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:45:53,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8101 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:00,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808352474] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:00,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:00,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-04-06 20:46:00,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:00,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012625914] [2022-04-06 20:46:00,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012625914] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:00,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:00,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 20:46:00,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438878584] [2022-04-06 20:46:00,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:00,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 20:46:00,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 20:46:00,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16655, Invalid=17017, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:46:00,022 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:02,773 INFO L93 Difference]: Finished difference Result 206 states and 211 transitions. [2022-04-06 20:46:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 20:46:02,773 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 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 193 [2022-04-06 20:46:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:02,774 INFO L225 Difference]: With dead ends: 206 [2022-04-06 20:46:02,774 INFO L226 Difference]: Without dead ends: 196 [2022-04-06 20:46:02,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=33126, Invalid=41676, Unknown=0, NotChecked=0, Total=74802 [2022-04-06 20:46:02,783 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:02,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 41 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-04-06 20:46:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-04-06 20:46:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0157068062827226) internal successors, (194), 191 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-04-06 20:46:02,789 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 193 [2022-04-06 20:46:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:02,789 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-04-06 20:46:02,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-04-06 20:46:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 20:46:02,790 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:02,790 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:02,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:03,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-04-06 20:46:03,007 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash 887038873, now seen corresponding path program 177 times [2022-04-06 20:46:03,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:03,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1552009784] [2022-04-06 20:46:03,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:03,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash 887038873, now seen corresponding path program 178 times [2022-04-06 20:46:03,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:03,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139902107] [2022-04-06 20:46:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:03,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:05,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8282 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:05,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139902107] [2022-04-06 20:46:05,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139902107] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685138365] [2022-04-06 20:46:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:05,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:05,291 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:05,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:46:05,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:05,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:05,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:46:05,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8282 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:05,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8282 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:12,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685138365] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:12,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:12,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-04-06 20:46:12,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:12,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1552009784] [2022-04-06 20:46:12,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1552009784] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:12,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:12,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 20:46:12,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948354212] [2022-04-06 20:46:12,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:12,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 20:46:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 20:46:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17022, Invalid=17388, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 20:46:12,339 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:15,162 INFO L93 Difference]: Finished difference Result 208 states and 213 transitions. [2022-04-06 20:46:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 20:46:15,162 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 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 195 [2022-04-06 20:46:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:15,163 INFO L225 Difference]: With dead ends: 208 [2022-04-06 20:46:15,163 INFO L226 Difference]: Without dead ends: 198 [2022-04-06 20:46:15,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4634 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=33858, Invalid=42594, Unknown=0, NotChecked=0, Total=76452 [2022-04-06 20:46:15,166 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:15,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 21 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:46:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-04-06 20:46:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-04-06 20:46:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 193 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2022-04-06 20:46:15,183 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 195 [2022-04-06 20:46:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:15,184 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2022-04-06 20:46:15,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2022-04-06 20:46:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:46:15,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:15,184 INFO L499 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:15,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:15,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:15,401 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash 834570550, now seen corresponding path program 179 times [2022-04-06 20:46:15,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:15,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1541586046] [2022-04-06 20:46:15,402 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:15,402 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash 834570550, now seen corresponding path program 180 times [2022-04-06 20:46:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:15,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548603845] [2022-04-06 20:46:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:17,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8465 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:17,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:17,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548603845] [2022-04-06 20:46:17,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548603845] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:17,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036844221] [2022-04-06 20:46:17,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:17,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:17,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:17,747 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:17,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:46:17,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:46:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:46:17,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8465 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 20:46:18,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8465 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 20:46:18,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036844221] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:18,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:18,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 4, 4] total 99 [2022-04-06 20:46:18,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:18,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1541586046] [2022-04-06 20:46:18,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1541586046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:18,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:18,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 20:46:18,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130559447] [2022-04-06 20:46:18,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:18,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 20:46:18,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:18,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 20:46:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4387, Invalid=5315, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:46:18,653 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:21,562 INFO L93 Difference]: Finished difference Result 210 states and 215 transitions. [2022-04-06 20:46:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:46:21,562 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 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 197 [2022-04-06 20:46:21,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:21,563 INFO L225 Difference]: With dead ends: 210 [2022-04-06 20:46:21,563 INFO L226 Difference]: Without dead ends: 200 [2022-04-06 20:46:21,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13127, Invalid=23163, Unknown=0, NotChecked=0, Total=36290 [2022-04-06 20:46:21,564 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 102 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:21,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 51 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:46:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-04-06 20:46:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-04-06 20:46:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2022-04-06 20:46:21,571 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2022-04-06 20:46:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:21,571 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2022-04-06 20:46:21,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2022-04-06 20:46:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 20:46:21,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:21,572 INFO L499 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:21,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 20:46:21,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:21,772 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1952119699, now seen corresponding path program 181 times [2022-04-06 20:46:21,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:21,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1798908282] [2022-04-06 20:46:21,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:21,774 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:21,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1952119699, now seen corresponding path program 182 times [2022-04-06 20:46:21,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:21,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836949633] [2022-04-06 20:46:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:21,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:24,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8650 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:24,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:24,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836949633] [2022-04-06 20:46:24,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836949633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:24,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352513537] [2022-04-06 20:46:24,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:24,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:24,145 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:24,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:46:24,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:24,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:24,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 20:46:24,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8650 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:24,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8650 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:31,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352513537] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:31,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:31,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-04-06 20:46:31,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:31,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1798908282] [2022-04-06 20:46:31,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1798908282] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:31,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:31,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 20:46:31,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995695896] [2022-04-06 20:46:31,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:31,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 20:46:31,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:31,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 20:46:31,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 20:46:31,480 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:34,425 INFO L93 Difference]: Finished difference Result 212 states and 217 transitions. [2022-04-06 20:46:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 20:46:34,425 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 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 199 [2022-04-06 20:46:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:34,426 INFO L225 Difference]: With dead ends: 212 [2022-04-06 20:46:34,426 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 20:46:34,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=35346, Invalid=44460, Unknown=0, NotChecked=0, Total=79806 [2022-04-06 20:46:34,429 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:34,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 61 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:46:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 20:46:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-04-06 20:46:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2022-04-06 20:46:34,436 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 199 [2022-04-06 20:46:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:34,437 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2022-04-06 20:46:34,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2022-04-06 20:46:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 20:46:34,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:34,444 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:34,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:34,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:34,659 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2119939408, now seen corresponding path program 183 times [2022-04-06 20:46:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:34,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1503005529] [2022-04-06 20:46:34,661 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:34,661 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2119939408, now seen corresponding path program 184 times [2022-04-06 20:46:34,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:34,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727251985] [2022-04-06 20:46:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:37,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8837 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:37,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:37,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727251985] [2022-04-06 20:46:37,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727251985] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:37,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904610885] [2022-04-06 20:46:37,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:37,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:37,108 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:37,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:46:37,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:37,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:37,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:46:37,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8837 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:37,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8837 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:44,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904610885] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:44,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:44,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-04-06 20:46:44,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1503005529] [2022-04-06 20:46:44,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1503005529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:44,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:44,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 20:46:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680379817] [2022-04-06 20:46:44,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:44,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 20:46:44,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 20:46:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18147, Invalid=18525, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 20:46:44,634 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:47,617 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2022-04-06 20:46:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 20:46:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 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 201 [2022-04-06 20:46:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:47,618 INFO L225 Difference]: With dead ends: 214 [2022-04-06 20:46:47,618 INFO L226 Difference]: Without dead ends: 204 [2022-04-06 20:46:47,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4928 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=36102, Invalid=45408, Unknown=0, NotChecked=0, Total=81510 [2022-04-06 20:46:47,621 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:47,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 46 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-04-06 20:46:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-04-06 20:46:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.015075376884422) internal successors, (202), 199 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2022-04-06 20:46:47,628 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 201 [2022-04-06 20:46:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:47,628 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2022-04-06 20:46:47,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2022-04-06 20:46:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 20:46:47,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:47,629 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:47,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-06 20:46:47,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:47,829 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:47,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1641432717, now seen corresponding path program 185 times [2022-04-06 20:46:47,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:47,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309964241] [2022-04-06 20:46:47,831 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:47,831 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:47,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1641432717, now seen corresponding path program 186 times [2022-04-06 20:46:47,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:47,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248373647] [2022-04-06 20:46:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:47,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:50,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9026 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:50,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:50,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248373647] [2022-04-06 20:46:50,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248373647] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:50,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820350547] [2022-04-06 20:46:50,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:50,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:50,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:50,281 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:50,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:46:50,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:46:50,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:50,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:46:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9026 backedges. 95 proven. 1 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-04-06 20:46:50,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9026 backedges. 95 proven. 1 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-04-06 20:46:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820350547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:51,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:51,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 4, 4] total 102 [2022-04-06 20:46:51,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [309964241] [2022-04-06 20:46:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [309964241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:51,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:51,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 20:46:51,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187599375] [2022-04-06 20:46:51,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:51,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 20:46:51,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 20:46:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4672, Invalid=5630, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:46:51,230 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:54,422 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2022-04-06 20:46:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 20:46:54,422 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 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 203 [2022-04-06 20:46:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:54,423 INFO L225 Difference]: With dead ends: 216 [2022-04-06 20:46:54,423 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 20:46:54,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13982, Invalid=24630, Unknown=0, NotChecked=0, Total=38612 [2022-04-06 20:46:54,425 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 105 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:54,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 46 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:46:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 20:46:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-04-06 20:46:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0149253731343284) internal successors, (204), 201 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2022-04-06 20:46:54,432 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 203 [2022-04-06 20:46:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:54,432 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2022-04-06 20:46:54,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2022-04-06 20:46:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 20:46:54,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:54,432 INFO L499 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:54,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-04-06 20:46:54,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-04-06 20:46:54,639 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash -42418390, now seen corresponding path program 187 times [2022-04-06 20:46:54,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:54,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638293539] [2022-04-06 20:46:54,641 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:54,641 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:54,641 INFO L85 PathProgramCache]: Analyzing trace with hash -42418390, now seen corresponding path program 188 times [2022-04-06 20:46:54,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:54,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14381845] [2022-04-06 20:46:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:54,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:57,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9217 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:57,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:57,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14381845] [2022-04-06 20:46:57,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14381845] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:57,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809542375] [2022-04-06 20:46:57,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:57,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:57,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:57,169 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:57,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:46:57,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:57,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:57,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:46:57,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9217 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:57,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9217 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:05,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809542375] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:05,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:05,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-04-06 20:47:05,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:05,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638293539] [2022-04-06 20:47:05,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638293539] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:05,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:05,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 20:47:05,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052335342] [2022-04-06 20:47:05,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:05,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 20:47:05,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 20:47:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:47:05,039 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:08,128 INFO L93 Difference]: Finished difference Result 218 states and 223 transitions. [2022-04-06 20:47:08,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 20:47:08,128 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 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 205 [2022-04-06 20:47:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:08,129 INFO L225 Difference]: With dead ends: 218 [2022-04-06 20:47:08,129 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 20:47:08,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=37638, Invalid=47334, Unknown=0, NotChecked=0, Total=84972 [2022-04-06 20:47:08,132 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 106 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:08,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 31 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 20:47:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-04-06 20:47:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2022-04-06 20:47:08,156 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 205 [2022-04-06 20:47:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:08,156 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2022-04-06 20:47:08,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2022-04-06 20:47:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 20:47:08,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:08,157 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:08,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:08,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-06 20:47:08,367 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:08,368 INFO L85 PathProgramCache]: Analyzing trace with hash 979338375, now seen corresponding path program 189 times [2022-04-06 20:47:08,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:08,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [483394580] [2022-04-06 20:47:08,369 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:08,369 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:08,369 INFO L85 PathProgramCache]: Analyzing trace with hash 979338375, now seen corresponding path program 190 times [2022-04-06 20:47:08,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:08,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429649522] [2022-04-06 20:47:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:08,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:10,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9410 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:10,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:10,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429649522] [2022-04-06 20:47:10,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429649522] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:10,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439388911] [2022-04-06 20:47:10,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:10,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:10,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:10,935 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:10,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:47:10,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:10,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:10,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 20:47:10,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9410 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:11,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9410 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:18,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439388911] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:18,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:18,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-04-06 20:47:18,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [483394580] [2022-04-06 20:47:18,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [483394580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:18,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:18,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 20:47:18,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214373087] [2022-04-06 20:47:18,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:18,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 20:47:18,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 20:47:18,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19308, Invalid=19698, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 20:47:18,970 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:22,189 INFO L93 Difference]: Finished difference Result 220 states and 225 transitions. [2022-04-06 20:47:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 20:47:22,189 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 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 207 [2022-04-06 20:47:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:22,194 INFO L225 Difference]: With dead ends: 220 [2022-04-06 20:47:22,194 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 20:47:22,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5231 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=38418, Invalid=48312, Unknown=0, NotChecked=0, Total=86730 [2022-04-06 20:47:22,197 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:22,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 51 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:47:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 20:47:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-04-06 20:47:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0146341463414634) internal successors, (208), 205 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2022-04-06 20:47:22,205 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 207 [2022-04-06 20:47:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:22,205 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2022-04-06 20:47:22,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2022-04-06 20:47:22,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 20:47:22,205 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:22,206 INFO L499 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:22,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 20:47:22,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 20:47:22,406 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash -659921244, now seen corresponding path program 191 times [2022-04-06 20:47:22,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:22,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1828396305] [2022-04-06 20:47:22,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:22,408 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash -659921244, now seen corresponding path program 192 times [2022-04-06 20:47:22,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:22,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34648006] [2022-04-06 20:47:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:22,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:25,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9605 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:25,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:25,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34648006] [2022-04-06 20:47:25,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34648006] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:25,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222484434] [2022-04-06 20:47:25,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:25,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:25,034 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:25,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:47:25,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:47:25,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:25,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:47:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9605 backedges. 98 proven. 1 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2022-04-06 20:47:25,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9605 backedges. 98 proven. 1 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2022-04-06 20:47:26,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222484434] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:26,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:26,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 4, 4] total 105 [2022-04-06 20:47:26,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:26,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1828396305] [2022-04-06 20:47:26,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1828396305] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:26,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:26,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 20:47:26,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723393690] [2022-04-06 20:47:26,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:26,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 20:47:26,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 20:47:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4966, Invalid=5954, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:47:26,005 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:29,238 INFO L93 Difference]: Finished difference Result 222 states and 227 transitions. [2022-04-06 20:47:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 20:47:29,238 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 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 209 [2022-04-06 20:47:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:29,239 INFO L225 Difference]: With dead ends: 222 [2022-04-06 20:47:29,239 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:47:29,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5438 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14864, Invalid=26142, Unknown=0, NotChecked=0, Total=41006 [2022-04-06 20:47:29,241 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:29,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 41 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:47:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:47:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 20:47:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0144927536231885) internal successors, (210), 207 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2022-04-06 20:47:29,248 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2022-04-06 20:47:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:29,248 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2022-04-06 20:47:29,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2022-04-06 20:47:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 20:47:29,249 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:29,249 INFO L499 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:29,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-04-06 20:47:29,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:29,463 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:29,464 INFO L85 PathProgramCache]: Analyzing trace with hash 264582529, now seen corresponding path program 193 times [2022-04-06 20:47:29,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:29,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [618665141] [2022-04-06 20:47:29,465 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:29,465 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash 264582529, now seen corresponding path program 194 times [2022-04-06 20:47:29,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:29,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114526738] [2022-04-06 20:47:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:29,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:32,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9802 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:32,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:32,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114526738] [2022-04-06 20:47:32,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114526738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:32,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038768409] [2022-04-06 20:47:32,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:32,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:32,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:32,153 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:32,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:47:32,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:32,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:32,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 20:47:32,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9802 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:32,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9802 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:40,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038768409] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:40,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:40,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-04-06 20:47:40,490 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:40,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [618665141] [2022-04-06 20:47:40,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [618665141] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:40,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:40,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 20:47:40,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639805576] [2022-04-06 20:47:40,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:40,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 20:47:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:40,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 20:47:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20102, Invalid=20500, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:47:40,494 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:43,791 INFO L93 Difference]: Finished difference Result 224 states and 229 transitions. [2022-04-06 20:47:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:47:43,792 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 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 211 [2022-04-06 20:47:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:43,792 INFO L225 Difference]: With dead ends: 224 [2022-04-06 20:47:43,792 INFO L226 Difference]: Without dead ends: 214 [2022-04-06 20:47:43,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5438 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=40002, Invalid=50298, Unknown=0, NotChecked=0, Total=90300 [2022-04-06 20:47:43,808 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:43,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 46 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:47:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-04-06 20:47:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-04-06 20:47:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.014354066985646) internal successors, (212), 209 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2022-04-06 20:47:43,815 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 211 [2022-04-06 20:47:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:43,815 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2022-04-06 20:47:43,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2022-04-06 20:47:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 20:47:43,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:43,816 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:43,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:44,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-04-06 20:47:44,017 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:44,017 INFO L85 PathProgramCache]: Analyzing trace with hash -345521890, now seen corresponding path program 195 times [2022-04-06 20:47:44,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:44,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1317088662] [2022-04-06 20:47:44,018 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:44,018 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:44,018 INFO L85 PathProgramCache]: Analyzing trace with hash -345521890, now seen corresponding path program 196 times [2022-04-06 20:47:44,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:44,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66958207] [2022-04-06 20:47:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:44,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:46,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10001 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:46,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:46,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66958207] [2022-04-06 20:47:46,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66958207] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:46,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367873398] [2022-04-06 20:47:46,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:46,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:46,756 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:46,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:47:46,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:46,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:46,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:47:46,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10001 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:47,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10001 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:47:55,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367873398] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:55,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:55,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-04-06 20:47:55,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:55,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1317088662] [2022-04-06 20:47:55,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1317088662] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:55,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:55,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 20:47:55,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139298619] [2022-04-06 20:47:55,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:55,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 20:47:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 20:47:55,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2022-04-06 20:47:55,231 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:58,594 INFO L93 Difference]: Finished difference Result 226 states and 231 transitions. [2022-04-06 20:47:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 20:47:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 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 213 [2022-04-06 20:47:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:58,595 INFO L225 Difference]: With dead ends: 226 [2022-04-06 20:47:58,595 INFO L226 Difference]: Without dead ends: 216 [2022-04-06 20:47:58,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5543 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=40806, Invalid=51306, Unknown=0, NotChecked=0, Total=92112 [2022-04-06 20:47:58,599 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:58,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 56 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:47:58,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-04-06 20:47:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-04-06 20:47:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.014218009478673) internal successors, (214), 211 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2022-04-06 20:47:58,615 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 213 [2022-04-06 20:47:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:58,615 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2022-04-06 20:47:58,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2022-04-06 20:47:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 20:47:58,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:58,616 INFO L499 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:58,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-06 20:47:58,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:58,816 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1754651003, now seen corresponding path program 197 times [2022-04-06 20:47:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:58,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [553135280] [2022-04-06 20:47:58,817 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:58,818 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1754651003, now seen corresponding path program 198 times [2022-04-06 20:47:58,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:58,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492588988] [2022-04-06 20:47:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:01,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10202 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:01,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:01,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492588988] [2022-04-06 20:48:01,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492588988] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:01,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51258560] [2022-04-06 20:48:01,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:01,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:01,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:01,630 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:01,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:48:01,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:48:01,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:48:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10202 backedges. 101 proven. 1 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2022-04-06 20:48:02,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10202 backedges. 101 proven. 1 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2022-04-06 20:48:02,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51258560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:02,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:02,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 4, 4] total 108 [2022-04-06 20:48:02,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:02,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [553135280] [2022-04-06 20:48:02,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [553135280] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:02,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:02,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 20:48:02,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396939330] [2022-04-06 20:48:02,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:02,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 20:48:02,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 20:48:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5269, Invalid=6287, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:48:02,642 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:06,177 INFO L93 Difference]: Finished difference Result 228 states and 233 transitions. [2022-04-06 20:48:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 20:48:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 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 215 [2022-04-06 20:48:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:06,178 INFO L225 Difference]: With dead ends: 228 [2022-04-06 20:48:06,178 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 20:48:06,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5756 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15773, Invalid=27699, Unknown=0, NotChecked=0, Total=43472 [2022-04-06 20:48:06,180 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 111 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:06,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:48:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 20:48:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-04-06 20:48:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0140845070422535) internal successors, (216), 213 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2022-04-06 20:48:06,192 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 215 [2022-04-06 20:48:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:06,192 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2022-04-06 20:48:06,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2022-04-06 20:48:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 20:48:06,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:06,196 INFO L499 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:06,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:06,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:48:06,412 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1386172056, now seen corresponding path program 199 times [2022-04-06 20:48:06,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:06,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451668036] [2022-04-06 20:48:06,413 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:06,413 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1386172056, now seen corresponding path program 200 times [2022-04-06 20:48:06,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:06,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766948129] [2022-04-06 20:48:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:06,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:09,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10405 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:09,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:09,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766948129] [2022-04-06 20:48:09,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766948129] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:09,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888909102] [2022-04-06 20:48:09,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:09,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:09,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:09,308 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:09,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:48:09,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:48:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10405 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:09,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10405 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:18,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888909102] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:18,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:18,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 208 [2022-04-06 20:48:18,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:18,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451668036] [2022-04-06 20:48:18,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451668036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:18,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:18,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-04-06 20:48:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690297950] [2022-04-06 20:48:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:18,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-06 20:48:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-06 20:48:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21323, Invalid=21733, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:48:18,348 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:21,937 INFO L93 Difference]: Finished difference Result 230 states and 235 transitions. [2022-04-06 20:48:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 20:48:21,937 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 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 217 [2022-04-06 20:48:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:21,938 INFO L225 Difference]: With dead ends: 230 [2022-04-06 20:48:21,938 INFO L226 Difference]: Without dead ends: 220 [2022-04-06 20:48:21,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5756 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=42438, Invalid=53352, Unknown=0, NotChecked=0, Total=95790 [2022-04-06 20:48:21,941 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:21,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 41 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:48:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-06 20:48:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-04-06 20:48:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2022-04-06 20:48:21,948 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 217 [2022-04-06 20:48:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:21,948 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2022-04-06 20:48:21,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2022-04-06 20:48:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-06 20:48:21,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:21,949 INFO L499 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:21,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:22,149 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:22,149 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash -534777739, now seen corresponding path program 201 times [2022-04-06 20:48:22,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:22,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [555796288] [2022-04-06 20:48:22,150 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:22,150 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash -534777739, now seen corresponding path program 202 times [2022-04-06 20:48:22,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:22,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881946847] [2022-04-06 20:48:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:22,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:25,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10610 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:25,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881946847] [2022-04-06 20:48:25,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881946847] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698238063] [2022-04-06 20:48:25,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:25,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:25,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:25,121 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:25,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:48:25,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:25,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:25,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 20:48:25,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10610 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:25,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10610 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:34,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698238063] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:34,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:34,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 210 [2022-04-06 20:48:34,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:34,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [555796288] [2022-04-06 20:48:34,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [555796288] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:34,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:34,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 20:48:34,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64819011] [2022-04-06 20:48:34,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:34,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 20:48:34,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:34,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 20:48:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21738, Invalid=22152, Unknown=0, NotChecked=0, Total=43890 [2022-04-06 20:48:34,063 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:37,671 INFO L93 Difference]: Finished difference Result 232 states and 237 transitions. [2022-04-06 20:48:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 20:48:37,672 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 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 219 [2022-04-06 20:48:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:37,672 INFO L225 Difference]: With dead ends: 232 [2022-04-06 20:48:37,672 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 20:48:37,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=43266, Invalid=54390, Unknown=0, NotChecked=0, Total=97656 [2022-04-06 20:48:37,676 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:37,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 31 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:48:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 20:48:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-04-06 20:48:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0138248847926268) internal successors, (220), 217 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2022-04-06 20:48:37,683 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 219 [2022-04-06 20:48:37,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:37,683 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2022-04-06 20:48:37,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2022-04-06 20:48:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 20:48:37,684 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:37,684 INFO L499 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:37,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:37,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-04-06 20:48:37,900 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:37,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash 268406546, now seen corresponding path program 203 times [2022-04-06 20:48:37,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:37,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2262835] [2022-04-06 20:48:37,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:37,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash 268406546, now seen corresponding path program 204 times [2022-04-06 20:48:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:37,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981069870] [2022-04-06 20:48:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:40,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10817 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:40,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:40,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981069870] [2022-04-06 20:48:40,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981069870] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:40,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482411890] [2022-04-06 20:48:40,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:40,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:40,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:40,882 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:40,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:48:40,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:48:40,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:48:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10817 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2022-04-06 20:48:41,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10817 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2022-04-06 20:48:41,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482411890] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:41,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:41,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 4, 4] total 111 [2022-04-06 20:48:41,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:41,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2262835] [2022-04-06 20:48:41,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2262835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:41,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:41,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 20:48:41,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574085163] [2022-04-06 20:48:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:41,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 20:48:41,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 20:48:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5581, Invalid=6629, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:48:41,909 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:45,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:45,626 INFO L93 Difference]: Finished difference Result 234 states and 239 transitions. [2022-04-06 20:48:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 20:48:45,626 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 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 221 [2022-04-06 20:48:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:45,627 INFO L225 Difference]: With dead ends: 234 [2022-04-06 20:48:45,627 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 20:48:45,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16709, Invalid=29301, Unknown=0, NotChecked=0, Total=46010 [2022-04-06 20:48:45,629 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:45,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 41 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:48:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 20:48:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-04-06 20:48:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2022-04-06 20:48:45,635 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 221 [2022-04-06 20:48:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:45,636 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2022-04-06 20:48:45,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2022-04-06 20:48:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 20:48:45,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:45,636 INFO L499 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:45,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:45,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:45,837 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:45,837 INFO L85 PathProgramCache]: Analyzing trace with hash -965608849, now seen corresponding path program 205 times [2022-04-06 20:48:45,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:45,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [892765699] [2022-04-06 20:48:45,838 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:45,838 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash -965608849, now seen corresponding path program 206 times [2022-04-06 20:48:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:45,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875288810] [2022-04-06 20:48:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:48,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:48,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875288810] [2022-04-06 20:48:48,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875288810] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843176771] [2022-04-06 20:48:48,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:48,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:48,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:48,917 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:48,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:48:48,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:48,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 106 conjunts are in the unsatisfiable core [2022-04-06 20:48:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:49,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:48:58,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843176771] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:58,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:58,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 214 [2022-04-06 20:48:58,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [892765699] [2022-04-06 20:48:58,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [892765699] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:58,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:58,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-04-06 20:48:58,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123366423] [2022-04-06 20:48:58,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:58,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-04-06 20:48:58,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-04-06 20:48:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22580, Invalid=23002, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 20:48:58,309 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:02,081 INFO L93 Difference]: Finished difference Result 236 states and 241 transitions. [2022-04-06 20:49:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 20:49:02,081 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 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 223 [2022-04-06 20:49:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:02,082 INFO L225 Difference]: With dead ends: 236 [2022-04-06 20:49:02,082 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 20:49:02,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=44946, Invalid=56496, Unknown=0, NotChecked=0, Total=101442 [2022-04-06 20:49:02,085 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 115 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:02,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 36 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:49:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 20:49:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-04-06 20:49:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0135746606334841) internal successors, (224), 221 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2022-04-06 20:49:02,092 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 223 [2022-04-06 20:49:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:02,092 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2022-04-06 20:49:02,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2022-04-06 20:49:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-04-06 20:49:02,093 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:02,093 INFO L499 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:02,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 20:49:02,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:02,293 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:02,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:02,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1443429748, now seen corresponding path program 207 times [2022-04-06 20:49:02,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:02,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1041704358] [2022-04-06 20:49:02,295 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:02,295 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1443429748, now seen corresponding path program 208 times [2022-04-06 20:49:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:02,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657990879] [2022-04-06 20:49:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:02,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:05,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11237 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:05,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:05,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657990879] [2022-04-06 20:49:05,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657990879] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:05,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513404874] [2022-04-06 20:49:05,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:05,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:05,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:05,376 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:05,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:49:05,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:05,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 20:49:05,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11237 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:05,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11237 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:14,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513404874] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:14,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:14,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 216 [2022-04-06 20:49:14,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1041704358] [2022-04-06 20:49:14,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1041704358] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:14,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:14,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-04-06 20:49:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471413102] [2022-04-06 20:49:14,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:14,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 20:49:14,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 20:49:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23007, Invalid=23433, Unknown=0, NotChecked=0, Total=46440 [2022-04-06 20:49:14,942 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:18,692 INFO L93 Difference]: Finished difference Result 238 states and 243 transitions. [2022-04-06 20:49:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-04-06 20:49:18,692 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 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 225 [2022-04-06 20:49:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:18,693 INFO L225 Difference]: With dead ends: 238 [2022-04-06 20:49:18,693 INFO L226 Difference]: Without dead ends: 228 [2022-04-06 20:49:18,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6194 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=45798, Invalid=57564, Unknown=0, NotChecked=0, Total=103362 [2022-04-06 20:49:18,697 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:18,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 41 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:49:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-06 20:49:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-04-06 20:49:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0134529147982063) internal successors, (226), 223 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2022-04-06 20:49:18,704 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 225 [2022-04-06 20:49:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:18,705 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2022-04-06 20:49:18,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2022-04-06 20:49:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 20:49:18,705 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:18,705 INFO L499 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:18,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-06 20:49:18,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-04-06 20:49:18,919 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1067813015, now seen corresponding path program 209 times [2022-04-06 20:49:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951999804] [2022-04-06 20:49:18,920 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:18,920 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:18,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1067813015, now seen corresponding path program 210 times [2022-04-06 20:49:18,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:18,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319751485] [2022-04-06 20:49:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:18,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:22,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11450 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:22,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319751485] [2022-04-06 20:49:22,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319751485] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803456380] [2022-04-06 20:49:22,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:22,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:22,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:22,104 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:22,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:49:22,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:49:22,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:22,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:49:22,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11450 backedges. 107 proven. 1 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2022-04-06 20:49:22,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11450 backedges. 107 proven. 1 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2022-04-06 20:49:23,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803456380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:23,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:23,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 4, 4] total 114 [2022-04-06 20:49:23,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951999804] [2022-04-06 20:49:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951999804] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:23,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:23,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-04-06 20:49:23,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873860342] [2022-04-06 20:49:23,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:23,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-06 20:49:23,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:23,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-06 20:49:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5902, Invalid=6980, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:49:23,176 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:27,043 INFO L93 Difference]: Finished difference Result 240 states and 245 transitions. [2022-04-06 20:49:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 20:49:27,043 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 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 227 [2022-04-06 20:49:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:27,044 INFO L225 Difference]: With dead ends: 240 [2022-04-06 20:49:27,044 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 20:49:27,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6419 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17672, Invalid=30948, Unknown=0, NotChecked=0, Total=48620 [2022-04-06 20:49:27,046 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 117 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:27,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 46 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:49:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 20:49:27,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-04-06 20:49:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0133333333333334) internal successors, (228), 225 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2022-04-06 20:49:27,053 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 227 [2022-04-06 20:49:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:27,053 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2022-04-06 20:49:27,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2022-04-06 20:49:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-04-06 20:49:27,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:27,054 INFO L499 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:27,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:27,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:27,254 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash -877385466, now seen corresponding path program 211 times [2022-04-06 20:49:27,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:27,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3001138] [2022-04-06 20:49:27,256 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:27,256 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash -877385466, now seen corresponding path program 212 times [2022-04-06 20:49:27,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:27,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257804984] [2022-04-06 20:49:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:27,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:30,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11665 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:30,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257804984] [2022-04-06 20:49:30,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257804984] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:30,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782321184] [2022-04-06 20:49:30,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:30,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:30,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:30,437 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:30,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:49:30,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:30,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:30,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 20:49:30,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11665 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:30,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11665 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:40,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782321184] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:40,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:40,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110, 110] total 220 [2022-04-06 20:49:40,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:40,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3001138] [2022-04-06 20:49:40,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3001138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:40,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:40,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-04-06 20:49:40,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949308058] [2022-04-06 20:49:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:40,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-06 20:49:40,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-06 20:49:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23873, Invalid=24307, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 20:49:40,351 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:44,281 INFO L93 Difference]: Finished difference Result 242 states and 247 transitions. [2022-04-06 20:49:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-06 20:49:44,281 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 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 229 [2022-04-06 20:49:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:44,282 INFO L225 Difference]: With dead ends: 242 [2022-04-06 20:49:44,282 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 20:49:44,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6419 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=47526, Invalid=59730, Unknown=0, NotChecked=0, Total=107256 [2022-04-06 20:49:44,286 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:44,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 46 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:49:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 20:49:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-04-06 20:49:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.013215859030837) internal successors, (230), 227 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2022-04-06 20:49:44,302 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 229 [2022-04-06 20:49:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:44,302 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2022-04-06 20:49:44,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2022-04-06 20:49:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-04-06 20:49:44,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:44,303 INFO L499 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:44,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-04-06 20:49:44,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:44,503 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:44,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1734862691, now seen corresponding path program 213 times [2022-04-06 20:49:44,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:44,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [175090855] [2022-04-06 20:49:44,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:44,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:44,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1734862691, now seen corresponding path program 214 times [2022-04-06 20:49:44,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:44,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207793584] [2022-04-06 20:49:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:44,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:47,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11882 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:47,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:47,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207793584] [2022-04-06 20:49:47,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207793584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:47,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857036072] [2022-04-06 20:49:47,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:47,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:47,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:47,827 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:47,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:49:47,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:47,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:47,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 110 conjunts are in the unsatisfiable core [2022-04-06 20:49:47,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11882 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:48,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11882 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:49:58,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857036072] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:58,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:58,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 111, 111] total 222 [2022-04-06 20:49:58,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:58,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [175090855] [2022-04-06 20:49:58,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [175090855] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:58,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:58,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-04-06 20:49:58,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965000710] [2022-04-06 20:49:58,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:58,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-04-06 20:49:58,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:58,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-04-06 20:49:58,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24312, Invalid=24750, Unknown=0, NotChecked=0, Total=49062 [2022-04-06 20:49:58,085 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:02,129 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2022-04-06 20:50:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 20:50:02,130 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 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 231 [2022-04-06 20:50:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:02,130 INFO L225 Difference]: With dead ends: 244 [2022-04-06 20:50:02,130 INFO L226 Difference]: Without dead ends: 234 [2022-04-06 20:50:02,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6533 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=48402, Invalid=60828, Unknown=0, NotChecked=0, Total=109230 [2022-04-06 20:50:02,134 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:02,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 31 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-04-06 20:50:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-04-06 20:50:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.0131004366812226) internal successors, (232), 229 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2022-04-06 20:50:02,141 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 231 [2022-04-06 20:50:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:02,141 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2022-04-06 20:50:02,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2022-04-06 20:50:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 20:50:02,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:02,142 INFO L499 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:02,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-04-06 20:50:02,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:02,343 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:02,343 INFO L85 PathProgramCache]: Analyzing trace with hash -450526592, now seen corresponding path program 215 times [2022-04-06 20:50:02,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:02,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892027917] [2022-04-06 20:50:02,344 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:02,344 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash -450526592, now seen corresponding path program 216 times [2022-04-06 20:50:02,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:02,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358054523] [2022-04-06 20:50:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:02,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:05,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12101 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:05,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:05,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358054523] [2022-04-06 20:50:05,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358054523] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:05,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229506830] [2022-04-06 20:50:05,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:05,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:05,665 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:05,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 20:50:05,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:05,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:50:05,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12101 backedges. 110 proven. 1 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2022-04-06 20:50:06,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12101 backedges. 110 proven. 1 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2022-04-06 20:50:06,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229506830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:06,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:06,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 4, 4] total 117 [2022-04-06 20:50:06,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:06,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892027917] [2022-04-06 20:50:06,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892027917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:06,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:06,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-04-06 20:50:06,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708681240] [2022-04-06 20:50:06,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:06,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-04-06 20:50:06,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:06,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-04-06 20:50:06,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6232, Invalid=7340, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:50:06,757 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:10,861 INFO L93 Difference]: Finished difference Result 246 states and 251 transitions. [2022-04-06 20:50:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-04-06 20:50:10,861 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 2 states have call successors, (3), 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 233 [2022-04-06 20:50:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:10,862 INFO L225 Difference]: With dead ends: 246 [2022-04-06 20:50:10,862 INFO L226 Difference]: Without dead ends: 236 [2022-04-06 20:50:10,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6764 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18662, Invalid=32640, Unknown=0, NotChecked=0, Total=51302 [2022-04-06 20:50:10,864 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:10,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 56 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-06 20:50:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-04-06 20:50:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.0129870129870129) internal successors, (234), 231 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2022-04-06 20:50:10,871 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 233 [2022-04-06 20:50:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:10,872 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2022-04-06 20:50:10,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2022-04-06 20:50:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-04-06 20:50:10,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:10,872 INFO L499 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:10,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-04-06 20:50:11,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-04-06 20:50:11,088 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -370619811, now seen corresponding path program 217 times [2022-04-06 20:50:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:11,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1939254613] [2022-04-06 20:50:11,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:11,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash -370619811, now seen corresponding path program 218 times [2022-04-06 20:50:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:11,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005361384] [2022-04-06 20:50:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:11,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:14,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12322 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:14,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:14,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005361384] [2022-04-06 20:50:14,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005361384] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:14,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711116550] [2022-04-06 20:50:14,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:14,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:14,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:14,496 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:14,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 20:50:14,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:14,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:14,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 112 conjunts are in the unsatisfiable core [2022-04-06 20:50:14,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12322 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:14,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12322 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:25,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711116550] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:25,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:25,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 113, 113] total 226 [2022-04-06 20:50:25,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:25,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1939254613] [2022-04-06 20:50:25,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1939254613] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:25,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:25,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-04-06 20:50:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940983781] [2022-04-06 20:50:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:25,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-04-06 20:50:25,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-04-06 20:50:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25202, Invalid=25648, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 20:50:25,067 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:29,310 INFO L93 Difference]: Finished difference Result 248 states and 253 transitions. [2022-04-06 20:50:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-04-06 20:50:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 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 235 [2022-04-06 20:50:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:29,311 INFO L225 Difference]: With dead ends: 248 [2022-04-06 20:50:29,311 INFO L226 Difference]: Without dead ends: 238 [2022-04-06 20:50:29,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6764 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=50178, Invalid=63054, Unknown=0, NotChecked=0, Total=113232 [2022-04-06 20:50:29,314 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 121 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:29,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 36 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-04-06 20:50:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2022-04-06 20:50:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2022-04-06 20:50:29,322 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 235 [2022-04-06 20:50:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:29,322 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2022-04-06 20:50:29,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2022-04-06 20:50:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-04-06 20:50:29,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:29,323 INFO L499 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:29,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-04-06 20:50:29,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 20:50:29,523 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash -889614598, now seen corresponding path program 219 times [2022-04-06 20:50:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:29,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1866324752] [2022-04-06 20:50:29,524 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:29,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:29,525 INFO L85 PathProgramCache]: Analyzing trace with hash -889614598, now seen corresponding path program 220 times [2022-04-06 20:50:29,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:29,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914375017] [2022-04-06 20:50:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:29,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:32,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12545 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:32,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914375017] [2022-04-06 20:50:32,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914375017] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429718090] [2022-04-06 20:50:32,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:32,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:32,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:32,998 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:32,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 20:50:33,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:33,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:33,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 20:50:33,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12545 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:33,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12545 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:43,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429718090] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:43,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:43,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 114, 114] total 228 [2022-04-06 20:50:43,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:43,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1866324752] [2022-04-06 20:50:43,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1866324752] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:43,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:43,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-04-06 20:50:43,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595678907] [2022-04-06 20:50:43,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:43,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-04-06 20:50:43,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-04-06 20:50:43,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25653, Invalid=26103, Unknown=0, NotChecked=0, Total=51756 [2022-04-06 20:50:43,734 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:48,007 INFO L93 Difference]: Finished difference Result 250 states and 255 transitions. [2022-04-06 20:50:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-04-06 20:50:48,007 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 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 237 [2022-04-06 20:50:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:48,008 INFO L225 Difference]: With dead ends: 250 [2022-04-06 20:50:48,008 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 20:50:48,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=51078, Invalid=64182, Unknown=0, NotChecked=0, Total=115260 [2022-04-06 20:50:48,012 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:48,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 41 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:48,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 20:50:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-04-06 20:50:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0127659574468084) internal successors, (238), 235 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2022-04-06 20:50:48,019 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 237 [2022-04-06 20:50:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:48,019 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2022-04-06 20:50:48,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2022-04-06 20:50:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 20:50:48,020 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:48,020 INFO L499 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:48,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:48,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 20:50:48,220 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1427398569, now seen corresponding path program 221 times [2022-04-06 20:50:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:48,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [678663830] [2022-04-06 20:50:48,222 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:48,222 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1427398569, now seen corresponding path program 222 times [2022-04-06 20:50:48,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:48,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146899772] [2022-04-06 20:50:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:48,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:51,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12770 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:50:51,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:51,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146899772] [2022-04-06 20:50:51,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146899772] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:51,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321965595] [2022-04-06 20:50:51,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:51,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:51,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:51,759 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:51,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 20:50:51,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:51,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:51,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:50:51,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12770 backedges. 113 proven. 1 refuted. 0 times theorem prover too weak. 12656 trivial. 0 not checked. [2022-04-06 20:50:52,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12770 backedges. 113 proven. 1 refuted. 0 times theorem prover too weak. 12656 trivial. 0 not checked. [2022-04-06 20:50:52,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321965595] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:52,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:52,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 4, 4] total 120 [2022-04-06 20:50:52,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:52,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [678663830] [2022-04-06 20:50:52,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [678663830] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:52,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:52,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-04-06 20:50:52,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015656063] [2022-04-06 20:50:52,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:52,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-04-06 20:50:52,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:52,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-04-06 20:50:52,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6571, Invalid=7709, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:50:52,880 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:57,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:57,230 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2022-04-06 20:50:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-04-06 20:50:57,230 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 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 239 [2022-04-06 20:50:57,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:57,231 INFO L225 Difference]: With dead ends: 252 [2022-04-06 20:50:57,231 INFO L226 Difference]: Without dead ends: 242 [2022-04-06 20:50:57,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7118 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=19679, Invalid=34377, Unknown=0, NotChecked=0, Total=54056 [2022-04-06 20:50:57,233 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 123 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:57,233 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 41 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-04-06 20:50:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-04-06 20:50:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.0126582278481013) internal successors, (240), 237 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 244 transitions. [2022-04-06 20:50:57,240 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 244 transitions. Word has length 239 [2022-04-06 20:50:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:57,241 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 244 transitions. [2022-04-06 20:50:57,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 244 transitions. [2022-04-06 20:50:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-04-06 20:50:57,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:57,241 INFO L499 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:57,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:57,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-06 20:50:57,442 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:57,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1453248116, now seen corresponding path program 223 times [2022-04-06 20:50:57,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:57,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [247800089] [2022-04-06 20:50:57,443 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:57,443 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1453248116, now seen corresponding path program 224 times [2022-04-06 20:50:57,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:57,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909618067] [2022-04-06 20:50:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:57,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:01,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12997 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:01,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:01,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909618067] [2022-04-06 20:51:01,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909618067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:01,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452128632] [2022-04-06 20:51:01,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:01,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:01,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:01,027 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:01,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 20:51:01,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:01,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:01,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 20:51:01,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12997 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:01,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12997 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:12,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452128632] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:12,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:12,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 232 [2022-04-06 20:51:12,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:12,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [247800089] [2022-04-06 20:51:12,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [247800089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:12,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:12,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-04-06 20:51:12,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971632654] [2022-04-06 20:51:12,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:12,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-04-06 20:51:12,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-04-06 20:51:12,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26567, Invalid=27025, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 20:51:12,133 INFO L87 Difference]: Start difference. First operand 242 states and 244 transitions. Second operand has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:16,460 INFO L93 Difference]: Finished difference Result 254 states and 259 transitions. [2022-04-06 20:51:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-04-06 20:51:16,460 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 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 241 [2022-04-06 20:51:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:16,460 INFO L225 Difference]: With dead ends: 254 [2022-04-06 20:51:16,460 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 20:51:16,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7118 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=52902, Invalid=66468, Unknown=0, NotChecked=0, Total=119370 [2022-04-06 20:51:16,464 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 124 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:16,464 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 61 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:51:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 20:51:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-04-06 20:51:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2022-04-06 20:51:16,472 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 241 [2022-04-06 20:51:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:16,472 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2022-04-06 20:51:16,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2022-04-06 20:51:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-04-06 20:51:16,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:16,473 INFO L499 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:16,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:16,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:16,673 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:16,673 INFO L85 PathProgramCache]: Analyzing trace with hash -499193519, now seen corresponding path program 225 times [2022-04-06 20:51:16,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:16,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1444926104] [2022-04-06 20:51:16,676 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:16,676 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash -499193519, now seen corresponding path program 226 times [2022-04-06 20:51:16,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:16,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185685329] [2022-04-06 20:51:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:16,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:20,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13226 backedges. 115 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:20,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:20,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185685329] [2022-04-06 20:51:20,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185685329] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:20,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439692664] [2022-04-06 20:51:20,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:20,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:20,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:20,245 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:20,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 20:51:20,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:20,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:20,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 116 conjunts are in the unsatisfiable core [2022-04-06 20:51:20,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13226 backedges. 115 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:20,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13226 backedges. 115 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:31,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439692664] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:31,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:31,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 117, 117] total 234 [2022-04-06 20:51:31,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:31,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1444926104] [2022-04-06 20:51:31,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1444926104] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:31,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:31,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-04-06 20:51:31,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380434615] [2022-04-06 20:51:31,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:31,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-04-06 20:51:31,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-04-06 20:51:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27030, Invalid=27492, Unknown=0, NotChecked=0, Total=54522 [2022-04-06 20:51:31,520 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:35,915 INFO L93 Difference]: Finished difference Result 256 states and 261 transitions. [2022-04-06 20:51:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-04-06 20:51:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 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 243 [2022-04-06 20:51:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:35,916 INFO L225 Difference]: With dead ends: 256 [2022-04-06 20:51:35,916 INFO L226 Difference]: Without dead ends: 246 [2022-04-06 20:51:35,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7238 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=53826, Invalid=67626, Unknown=0, NotChecked=0, Total=121452 [2022-04-06 20:51:35,920 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:35,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 31 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:51:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-04-06 20:51:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-04-06 20:51:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.012448132780083) internal successors, (244), 241 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2022-04-06 20:51:35,928 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 243 [2022-04-06 20:51:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:35,928 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2022-04-06 20:51:35,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2022-04-06 20:51:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-04-06 20:51:35,929 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:35,929 INFO L499 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:35,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-04-06 20:51:36,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:36,130 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash 105103598, now seen corresponding path program 227 times [2022-04-06 20:51:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:36,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [751393961] [2022-04-06 20:51:36,131 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:36,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 105103598, now seen corresponding path program 228 times [2022-04-06 20:51:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:36,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256092964] [2022-04-06 20:51:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:39,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13457 backedges. 116 proven. 13340 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:39,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256092964] [2022-04-06 20:51:39,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256092964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822789085] [2022-04-06 20:51:39,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:39,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:39,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:39,792 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:39,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 20:51:39,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:51:39,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:39,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:51:39,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13457 backedges. 116 proven. 1 refuted. 0 times theorem prover too weak. 13340 trivial. 0 not checked. [2022-04-06 20:51:40,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13457 backedges. 116 proven. 1 refuted. 0 times theorem prover too weak. 13340 trivial. 0 not checked. [2022-04-06 20:51:40,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822789085] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:40,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:40,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 4, 4] total 123 [2022-04-06 20:51:40,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:40,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [751393961] [2022-04-06 20:51:40,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [751393961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:40,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:40,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-04-06 20:51:40,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737397276] [2022-04-06 20:51:40,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:40,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-04-06 20:51:40,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-04-06 20:51:40,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6919, Invalid=8087, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 20:51:40,925 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:45,382 INFO L93 Difference]: Finished difference Result 258 states and 263 transitions. [2022-04-06 20:51:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-04-06 20:51:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 2 states have call successors, (3), 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 245 [2022-04-06 20:51:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:45,383 INFO L225 Difference]: With dead ends: 258 [2022-04-06 20:51:45,383 INFO L226 Difference]: Without dead ends: 248 [2022-04-06 20:51:45,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7481 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20723, Invalid=36159, Unknown=0, NotChecked=0, Total=56882 [2022-04-06 20:51:45,385 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:45,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 46 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:51:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-04-06 20:51:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-04-06 20:51:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.0123456790123457) internal successors, (246), 243 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 250 transitions. [2022-04-06 20:51:45,398 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 250 transitions. Word has length 245 [2022-04-06 20:51:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:45,398 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 250 transitions. [2022-04-06 20:51:45,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 250 transitions. [2022-04-06 20:51:45,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-04-06 20:51:45,399 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:45,399 INFO L499 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:45,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:45,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-04-06 20:51:45,600 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:45,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1014048075, now seen corresponding path program 229 times [2022-04-06 20:51:45,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:45,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [904991044] [2022-04-06 20:51:45,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:45,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1014048075, now seen corresponding path program 230 times [2022-04-06 20:51:45,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:45,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851798930] [2022-04-06 20:51:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:45,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:49,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:49,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:49,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851798930] [2022-04-06 20:51:49,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851798930] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:49,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015927610] [2022-04-06 20:51:49,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:49,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:49,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:49,334 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:49,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 20:51:49,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 118 conjunts are in the unsatisfiable core [2022-04-06 20:51:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:49,734 INFO L328 TraceCheckSpWp]: Computing backward predicates...