/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:01:43,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:01:43,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:01:43,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:01:43,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:01:43,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:01:43,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:01:43,184 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 21:01:43,197 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:01:43,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:01:43,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:01:43,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:01:43,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:01:43,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:01:43,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:01:43,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:01:43,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:01:43,200 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:01:43,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:01:43,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:01:43,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:01:43,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:01:43,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:01:43,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:01:43,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:01:43,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:01:43,201 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:01:43,201 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:01:43,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:01:43,202 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:01:43,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:01:43,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:01:43,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:01:43,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:01:43,436 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:01:43,437 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:01:43,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2022-04-06 21:01:43,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ff2103c/caf329d9378845f995052fda597708c2/FLAG56ffc561f [2022-04-06 21:01:43,837 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:01:43,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2022-04-06 21:01:43,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ff2103c/caf329d9378845f995052fda597708c2/FLAG56ffc561f [2022-04-06 21:01:44,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ff2103c/caf329d9378845f995052fda597708c2 [2022-04-06 21:01:44,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:01:44,262 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:01:44,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:01:44,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:01:44,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:01:44,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14ae1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44, skipping insertion in model container [2022-04-06 21:01:44,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:01:44,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:01:44,407 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2022-04-06 21:01:44,410 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2022-04-06 21:01:44,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:01:44,428 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:01:44,448 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2022-04-06 21:01:44,449 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2022-04-06 21:01:44,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:01:44,464 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:01:44,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44 WrapperNode [2022-04-06 21:01:44,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:01:44,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:01:44,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:01:44,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:01:44,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:01:44,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:01:44,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:01:44,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:01:44,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44" (1/1) ... [2022-04-06 21:01:44,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:01:44,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:44,541 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 21:01:44,563 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 21:01:44,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:01:44,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:01:44,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:01:44,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:01:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:01:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:01:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:01:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2022-04-06 21:01:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:01:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:01:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:01:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:01:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:01:44,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:01:44,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:01:44,638 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:01:44,640 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:01:44,718 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:01:44,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:01:44,723 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:01:44,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:01:44 BoogieIcfgContainer [2022-04-06 21:01:44,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:01:44,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:01:44,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:01:44,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:01:44,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:01:44" (1/3) ... [2022-04-06 21:01:44,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e87069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:01:44, skipping insertion in model container [2022-04-06 21:01:44,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:01:44" (2/3) ... [2022-04-06 21:01:44,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e87069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:01:44, skipping insertion in model container [2022-04-06 21:01:44,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:01:44" (3/3) ... [2022-04-06 21:01:44,748 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2022-04-06 21:01:44,752 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:01:44,753 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-04-06 21:01:44,808 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:01:44,816 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 21:01:44,831 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-04-06 21:01:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:01:44,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-04-06 21:01:44,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:44,873 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:44,874 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:44,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:44,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1624254505, now seen corresponding path program 1 times [2022-04-06 21:01:44,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:44,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [791612172] [2022-04-06 21:01:44,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:01:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1624254505, now seen corresponding path program 2 times [2022-04-06 21:01:44,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:44,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884353932] [2022-04-06 21:01:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:45,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:45,130 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 21:01:45,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:45,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884353932] [2022-04-06 21:01:45,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884353932] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:45,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:45,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:01:45,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:45,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [791612172] [2022-04-06 21:01:45,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [791612172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:45,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:45,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:01:45,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095941617] [2022-04-06 21:01:45,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:45,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:01:45,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:01:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:01:45,163 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:45,217 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-04-06 21:01:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:01:45,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-04-06 21:01:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:45,226 INFO L225 Difference]: With dead ends: 29 [2022-04-06 21:01:45,226 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 21:01:45,228 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 21:01:45,231 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:45,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 21:01:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 21:01:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-06 21:01:45,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2022-04-06 21:01:45,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:45,259 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-06 21:01:45,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-06 21:01:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 21:01:45,260 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:45,260 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:45,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:01:45,261 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:45,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1187666007, now seen corresponding path program 1 times [2022-04-06 21:01:45,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:45,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [639959646] [2022-04-06 21:01:45,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:45,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1187666007, now seen corresponding path program 2 times [2022-04-06 21:01:45,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:45,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442145912] [2022-04-06 21:01:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:45,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:45,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:45,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442145912] [2022-04-06 21:01:45,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442145912] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:45,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949296412] [2022-04-06 21:01:45,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:45,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:45,396 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 21:01:45,398 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 21:01:45,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:45,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:45,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:01:45,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:45,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:45,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949296412] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:45,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:45,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 21:01:45,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:45,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [639959646] [2022-04-06 21:01:45,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [639959646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:45,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:45,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:01:45,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565267574] [2022-04-06 21:01:45,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:45,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:01:45,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:45,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:01:45,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:01:45,676 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:45,735 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-04-06 21:01:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:01:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 21:01:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:45,736 INFO L225 Difference]: With dead ends: 22 [2022-04-06 21:01:45,736 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 21:01:45,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:01:45,738 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:45,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 21:01:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-04-06 21:01:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-04-06 21:01:45,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2022-04-06 21:01:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:45,761 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-04-06 21:01:45,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-06 21:01:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 21:01:45,762 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:45,762 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:45,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 21:01:45,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:45,980 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:45,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1837062518, now seen corresponding path program 1 times [2022-04-06 21:01:45,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:45,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [280108099] [2022-04-06 21:01:45,983 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:45,983 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1837062518, now seen corresponding path program 2 times [2022-04-06 21:01:45,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:45,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091450629] [2022-04-06 21:01:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:45,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:46,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:46,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091450629] [2022-04-06 21:01:46,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091450629] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:46,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059833741] [2022-04-06 21:01:46,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:46,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:46,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:46,136 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 21:01:46,158 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 21:01:46,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:46,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:46,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:01:46,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:46,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:46,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059833741] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:46,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:46,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-04-06 21:01:46,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [280108099] [2022-04-06 21:01:46,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [280108099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:46,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:46,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:01:46,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769091018] [2022-04-06 21:01:46,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:46,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:01:46,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:01:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 21:01:46,306 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:46,370 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-04-06 21:01:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:01:46,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:01:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:46,372 INFO L225 Difference]: With dead ends: 20 [2022-04-06 21:01:46,372 INFO L226 Difference]: Without dead ends: 16 [2022-04-06 21:01:46,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:01:46,382 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:46,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-06 21:01:46,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-06 21:01:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-04-06 21:01:46,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2022-04-06 21:01:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:46,388 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-04-06 21:01:46,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-04-06 21:01:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 21:01:46,389 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:46,391 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:46,409 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 21:01:46,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 21:01:46,600 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1837111337, now seen corresponding path program 3 times [2022-04-06 21:01:46,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:46,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1726741209] [2022-04-06 21:01:46,602 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:46,602 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:46,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1837111337, now seen corresponding path program 4 times [2022-04-06 21:01:46,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:46,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556525907] [2022-04-06 21:01:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:46,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:46,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:46,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:46,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556525907] [2022-04-06 21:01:46,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556525907] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:46,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044688014] [2022-04-06 21:01:46,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:46,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:46,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:46,696 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 21:01:46,697 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 21:01:46,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:46,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:46,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:01:46,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:46,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:47,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044688014] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:47,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:47,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:01:47,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:47,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1726741209] [2022-04-06 21:01:47,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1726741209] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:47,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:47,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:01:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310909428] [2022-04-06 21:01:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:47,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:01:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:01:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:01:47,029 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:47,105 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-04-06 21:01:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:01:47,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:01:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:47,106 INFO L225 Difference]: With dead ends: 23 [2022-04-06 21:01:47,107 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 21:01:47,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:01:47,108 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:47,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 21:01:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-04-06 21:01:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-06 21:01:47,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2022-04-06 21:01:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:47,113 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-06 21:01:47,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-06 21:01:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 21:01:47,114 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:47,114 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:47,142 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 21:01:47,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:47,332 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1115879670, now seen corresponding path program 3 times [2022-04-06 21:01:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:47,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1475014556] [2022-04-06 21:01:47,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:47,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1115879670, now seen corresponding path program 4 times [2022-04-06 21:01:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:47,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583337787] [2022-04-06 21:01:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:47,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:47,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:47,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583337787] [2022-04-06 21:01:47,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583337787] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:47,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975223363] [2022-04-06 21:01:47,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:47,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:47,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:47,433 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 21:01:47,434 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 21:01:47,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:47,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:01:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:47,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:47,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975223363] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:47,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:47,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-04-06 21:01:47,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:47,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1475014556] [2022-04-06 21:01:47,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1475014556] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:47,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:47,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:01:47,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793318048] [2022-04-06 21:01:47,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:47,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:01:47,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:01:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:01:47,662 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:47,712 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-04-06 21:01:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:01:47,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 21:01:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:47,714 INFO L225 Difference]: With dead ends: 21 [2022-04-06 21:01:47,714 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 21:01:47,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:01:47,715 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:47,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 21:01:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 21:01:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-04-06 21:01:47,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2022-04-06 21:01:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:47,723 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-04-06 21:01:47,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-04-06 21:01:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 21:01:47,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:47,724 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:47,750 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 21:01:47,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:47,940 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:47,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1115928489, now seen corresponding path program 5 times [2022-04-06 21:01:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:47,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000638142] [2022-04-06 21:01:47,942 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:47,942 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1115928489, now seen corresponding path program 6 times [2022-04-06 21:01:47,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:47,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839277347] [2022-04-06 21:01:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:47,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:48,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:48,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:48,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839277347] [2022-04-06 21:01:48,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839277347] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:48,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272589384] [2022-04-06 21:01:48,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:48,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:48,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:48,056 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 21:01:48,086 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 21:01:48,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:01:48,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:48,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:01:48,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:48,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:48,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272589384] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:48,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:48,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 21:01:48,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:48,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000638142] [2022-04-06 21:01:48,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000638142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:48,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:48,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:01:48,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443041055] [2022-04-06 21:01:48,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:48,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:01:48,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:01:48,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:01:48,366 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:48,462 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-04-06 21:01:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:01:48,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 21:01:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:48,463 INFO L225 Difference]: With dead ends: 24 [2022-04-06 21:01:48,463 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 21:01:48,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:01:48,464 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:48,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 21:01:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-04-06 21:01:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-06 21:01:48,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2022-04-06 21:01:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:48,469 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-06 21:01:48,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-06 21:01:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 21:01:48,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:48,470 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:48,496 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 21:01:48,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:48,688 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash 234047862, now seen corresponding path program 5 times [2022-04-06 21:01:48,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:48,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1957600645] [2022-04-06 21:01:48,691 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:48,691 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:48,691 INFO L85 PathProgramCache]: Analyzing trace with hash 234047862, now seen corresponding path program 6 times [2022-04-06 21:01:48,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:48,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042451630] [2022-04-06 21:01:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:48,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:48,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:48,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042451630] [2022-04-06 21:01:48,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042451630] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087057801] [2022-04-06 21:01:48,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:48,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:48,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:48,779 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 21:01:48,780 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 21:01:48,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:01:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:01:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:48,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:49,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087057801] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:49,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:49,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-04-06 21:01:49,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:49,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1957600645] [2022-04-06 21:01:49,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1957600645] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:49,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:49,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:01:49,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178310062] [2022-04-06 21:01:49,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:49,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:01:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:01:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:01:49,061 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:49,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:49,134 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-04-06 21:01:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:01:49,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:01:49,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:49,135 INFO L225 Difference]: With dead ends: 22 [2022-04-06 21:01:49,135 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 21:01:49,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:01:49,136 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:49,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 21:01:49,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 21:01:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-04-06 21:01:49,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2022-04-06 21:01:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:49,144 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-04-06 21:01:49,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:49,144 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-04-06 21:01:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 21:01:49,144 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:49,144 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:49,170 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 21:01:49,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:49,359 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash 234096681, now seen corresponding path program 7 times [2022-04-06 21:01:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:49,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [519853645] [2022-04-06 21:01:49,362 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:49,362 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:49,362 INFO L85 PathProgramCache]: Analyzing trace with hash 234096681, now seen corresponding path program 8 times [2022-04-06 21:01:49,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:49,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189533794] [2022-04-06 21:01:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:49,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:49,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:49,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189533794] [2022-04-06 21:01:49,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189533794] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440327559] [2022-04-06 21:01:49,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:49,450 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 21:01:49,451 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 21:01:49,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:49,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:01:49,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:49,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:49,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440327559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:49,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:49,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 21:01:49,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:49,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [519853645] [2022-04-06 21:01:49,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [519853645] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:49,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:49,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:01:49,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166037032] [2022-04-06 21:01:49,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:49,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:01:49,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:01:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:01:49,871 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:49,996 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-04-06 21:01:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:01:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:01:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:49,997 INFO L225 Difference]: With dead ends: 25 [2022-04-06 21:01:49,997 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 21:01:49,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:01:49,998 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:49,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 21:01:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-04-06 21:01:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-04-06 21:01:50,002 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-04-06 21:01:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:50,003 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-04-06 21:01:50,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-06 21:01:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 21:01:50,003 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:50,003 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:50,027 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 21:01:50,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:50,204 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1332934410, now seen corresponding path program 7 times [2022-04-06 21:01:50,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:50,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [342810160] [2022-04-06 21:01:50,206 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:50,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:50,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1332934410, now seen corresponding path program 8 times [2022-04-06 21:01:50,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:50,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532510719] [2022-04-06 21:01:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:50,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:50,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:50,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532510719] [2022-04-06 21:01:50,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532510719] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:50,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970392747] [2022-04-06 21:01:50,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:50,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:50,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:50,310 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 21:01:50,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:01:50,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:50,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:01:50,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:50,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:50,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970392747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:50,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:50,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-04-06 21:01:50,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [342810160] [2022-04-06 21:01:50,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [342810160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:50,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:50,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:01:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917210823] [2022-04-06 21:01:50,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:50,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:01:50,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:01:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:01:50,687 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:50,763 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-04-06 21:01:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:01:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:01:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:50,764 INFO L225 Difference]: With dead ends: 23 [2022-04-06 21:01:50,764 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 21:01:50,765 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=173, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:01:50,765 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:50,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 21:01:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 21:01:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-04-06 21:01:50,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2022-04-06 21:01:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:50,769 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-04-06 21:01:50,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-04-06 21:01:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 21:01:50,770 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:50,770 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:50,774 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 21:01:50,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 21:01:50,971 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:50,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:50,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1332885591, now seen corresponding path program 9 times [2022-04-06 21:01:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:50,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [69005125] [2022-04-06 21:01:50,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:50,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:50,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1332885591, now seen corresponding path program 10 times [2022-04-06 21:01:50,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:50,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454266392] [2022-04-06 21:01:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:50,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:51,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:51,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454266392] [2022-04-06 21:01:51,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454266392] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863926264] [2022-04-06 21:01:51,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:51,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:51,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:51,073 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 21:01:51,107 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 21:01:51,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:51,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:51,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:01:51,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:51,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:51,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863926264] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:51,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:51,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 21:01:51,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [69005125] [2022-04-06 21:01:51,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [69005125] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:51,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:51,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:01:51,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365137866] [2022-04-06 21:01:51,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:51,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:01:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:01:51,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:01:51,502 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:51,645 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-04-06 21:01:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:01:51,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:01:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:51,645 INFO L225 Difference]: With dead ends: 26 [2022-04-06 21:01:51,646 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 21:01:51,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:01:51,646 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:51,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 21:01:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-04-06 21:01:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-04-06 21:01:51,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2022-04-06 21:01:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:51,651 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-04-06 21:01:51,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-04-06 21:01:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 21:01:51,651 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:51,651 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:51,678 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 21:01:51,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 21:01:51,852 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1630222710, now seen corresponding path program 9 times [2022-04-06 21:01:51,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:51,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [298522039] [2022-04-06 21:01:51,854 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:51,854 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:51,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1630222710, now seen corresponding path program 10 times [2022-04-06 21:01:51,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:51,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316038837] [2022-04-06 21:01:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:51,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:51,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:51,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316038837] [2022-04-06 21:01:51,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316038837] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411883666] [2022-04-06 21:01:51,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:51,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:51,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:51,987 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 21:01:52,001 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 21:01:52,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:52,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:01:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:52,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:52,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411883666] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:52,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:52,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-04-06 21:01:52,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:52,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [298522039] [2022-04-06 21:01:52,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [298522039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:52,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:52,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:01:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502123923] [2022-04-06 21:01:52,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:52,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:01:52,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:01:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:01:52,433 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:52,519 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-04-06 21:01:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:01:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 21:01:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:52,520 INFO L225 Difference]: With dead ends: 24 [2022-04-06 21:01:52,520 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 21:01:52,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=237, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:01:52,521 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:52,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 21:01:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 21:01:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-04-06 21:01:52,525 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2022-04-06 21:01:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:52,525 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-04-06 21:01:52,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-04-06 21:01:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 21:01:52,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:52,526 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:52,552 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 21:01:52,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 21:01:52,736 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:52,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1630271529, now seen corresponding path program 11 times [2022-04-06 21:01:52,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:52,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629631167] [2022-04-06 21:01:52,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:52,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1630271529, now seen corresponding path program 12 times [2022-04-06 21:01:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:52,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286914721] [2022-04-06 21:01:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:52,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:52,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286914721] [2022-04-06 21:01:52,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286914721] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:52,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213165660] [2022-04-06 21:01:52,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:52,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:52,859 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 21:01:52,861 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 21:01:52,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:01:52,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:01:52,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:53,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:53,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213165660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:53,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:53,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 21:01:53,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:53,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629631167] [2022-04-06 21:01:53,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629631167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:53,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:53,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:01:53,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729166462] [2022-04-06 21:01:53,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:53,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:01:53,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:01:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:01:53,435 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:53,609 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-04-06 21:01:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:01:53,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 21:01:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:53,610 INFO L225 Difference]: With dead ends: 27 [2022-04-06 21:01:53,610 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 21:01:53,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=373, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:01:53,611 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:53,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 21:01:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-04-06 21:01:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-04-06 21:01:53,618 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2022-04-06 21:01:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:53,619 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-04-06 21:01:53,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-04-06 21:01:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 21:01:53,619 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:53,619 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:53,643 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 21:01:53,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 21:01:53,839 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1001187082, now seen corresponding path program 11 times [2022-04-06 21:01:53,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:53,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [924165106] [2022-04-06 21:01:53,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:53,841 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1001187082, now seen corresponding path program 12 times [2022-04-06 21:01:53,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:53,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271366283] [2022-04-06 21:01:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:53,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:53,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:53,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:53,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271366283] [2022-04-06 21:01:53,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271366283] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019436578] [2022-04-06 21:01:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:53,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:53,951 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 21:01:53,952 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 21:01:54,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:01:54,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:54,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:01:54,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:54,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:54,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019436578] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:54,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:54,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-04-06 21:01:54,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:54,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [924165106] [2022-04-06 21:01:54,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [924165106] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:54,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:54,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:01:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133506959] [2022-04-06 21:01:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:54,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:01:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:01:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:01:54,475 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:54,569 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-04-06 21:01:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:01:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:01:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:54,570 INFO L225 Difference]: With dead ends: 25 [2022-04-06 21:01:54,570 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 21:01:54,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=311, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:01:54,571 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:54,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 21:01:54,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-06 21:01:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-04-06 21:01:54,575 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2022-04-06 21:01:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:54,575 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-04-06 21:01:54,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-04-06 21:01:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 21:01:54,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:54,575 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:54,598 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 21:01:54,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 21:01:54,784 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:54,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1001138263, now seen corresponding path program 13 times [2022-04-06 21:01:54,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:54,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1411476976] [2022-04-06 21:01:54,785 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:54,785 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:54,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1001138263, now seen corresponding path program 14 times [2022-04-06 21:01:54,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:54,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841942631] [2022-04-06 21:01:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:54,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:54,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:54,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:54,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841942631] [2022-04-06 21:01:54,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841942631] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:54,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762336728] [2022-04-06 21:01:54,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:54,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:54,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:54,921 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 21:01:54,950 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 21:01:54,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:54,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:54,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 21:01:54,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:55,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:55,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762336728] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:55,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:55,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 21:01:55,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:55,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1411476976] [2022-04-06 21:01:55,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1411476976] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:55,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:55,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:01:55,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920309489] [2022-04-06 21:01:55,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:55,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:01:55,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:01:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:01:55,543 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:55,725 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-04-06 21:01:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:01:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:01:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:55,727 INFO L225 Difference]: With dead ends: 28 [2022-04-06 21:01:55,727 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 21:01:55,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:01:55,728 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:55,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 21:01:55,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-04-06 21:01:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-04-06 21:01:55,732 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2022-04-06 21:01:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:55,733 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-04-06 21:01:55,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-04-06 21:01:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 21:01:55,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:55,733 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:55,761 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 21:01:55,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 21:01:55,956 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:55,956 INFO L85 PathProgramCache]: Analyzing trace with hash -970512010, now seen corresponding path program 13 times [2022-04-06 21:01:55,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:55,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240885274] [2022-04-06 21:01:55,957 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:55,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash -970512010, now seen corresponding path program 14 times [2022-04-06 21:01:55,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:55,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785022372] [2022-04-06 21:01:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:55,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:56,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:56,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:56,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785022372] [2022-04-06 21:01:56,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785022372] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:56,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261219569] [2022-04-06 21:01:56,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:56,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:56,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:56,095 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 21:01:56,096 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 21:01:56,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:56,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 21:01:56,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:56,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:56,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261219569] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:56,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:56,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2022-04-06 21:01:56,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240885274] [2022-04-06 21:01:56,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240885274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:56,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:56,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:01:56,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360634690] [2022-04-06 21:01:56,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:56,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:01:56,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:56,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:01:56,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:01:56,717 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:56,819 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-04-06 21:01:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:01:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 21:01:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:56,820 INFO L225 Difference]: With dead ends: 26 [2022-04-06 21:01:56,820 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 21:01:56,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=395, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:01:56,821 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:56,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 21:01:56,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 21:01:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-04-06 21:01:56,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 18 [2022-04-06 21:01:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:56,824 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-04-06 21:01:56,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-04-06 21:01:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 21:01:56,825 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:56,825 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:56,853 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 21:01:57,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:57,025 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash -970463191, now seen corresponding path program 15 times [2022-04-06 21:01:57,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:57,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1959306811] [2022-04-06 21:01:57,027 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:57,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:57,027 INFO L85 PathProgramCache]: Analyzing trace with hash -970463191, now seen corresponding path program 16 times [2022-04-06 21:01:57,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:57,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226476658] [2022-04-06 21:01:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:57,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:57,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:57,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226476658] [2022-04-06 21:01:57,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226476658] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042496873] [2022-04-06 21:01:57,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:57,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:57,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:57,161 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 21:01:57,163 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 21:01:57,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:57,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:57,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:01:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:57,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:57,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042496873] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:57,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:57,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 21:01:57,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:57,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1959306811] [2022-04-06 21:01:57,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1959306811] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:57,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:57,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:01:57,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769951656] [2022-04-06 21:01:57,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:57,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:01:57,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:01:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:01:57,836 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:58,043 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-04-06 21:01:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:01:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 21:01:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:58,046 INFO L225 Difference]: With dead ends: 29 [2022-04-06 21:01:58,046 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 21:01:58,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=569, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:01:58,047 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:58,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 21:01:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-04-06 21:01:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-04-06 21:01:58,051 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2022-04-06 21:01:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:58,051 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-04-06 21:01:58,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-04-06 21:01:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 21:01:58,052 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:58,052 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:58,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 21:01:58,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 21:01:58,259 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -19584778, now seen corresponding path program 15 times [2022-04-06 21:01:58,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:58,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [301785021] [2022-04-06 21:01:58,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:58,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash -19584778, now seen corresponding path program 16 times [2022-04-06 21:01:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:58,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038871763] [2022-04-06 21:01:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:58,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:58,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:58,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038871763] [2022-04-06 21:01:58,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038871763] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:58,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371656773] [2022-04-06 21:01:58,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:58,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:58,407 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 21:01:58,409 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 21:01:58,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:58,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:58,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:01:58,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:58,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:59,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371656773] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:59,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:59,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2022-04-06 21:01:59,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:59,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [301785021] [2022-04-06 21:01:59,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [301785021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:59,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:59,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:01:59,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910290455] [2022-04-06 21:01:59,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:59,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:01:59,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:59,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:01:59,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:01:59,114 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:59,236 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-04-06 21:01:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:01:59,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:01:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:59,258 INFO L225 Difference]: With dead ends: 27 [2022-04-06 21:01:59,258 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 21:01:59,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=489, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:01:59,259 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:59,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:01:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 21:01:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 21:01:59,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-04-06 21:01:59,263 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2022-04-06 21:01:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:59,263 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-04-06 21:01:59,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:01:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-04-06 21:01:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 21:01:59,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:59,264 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:59,285 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 21:01:59,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:01:59,477 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash -19535959, now seen corresponding path program 17 times [2022-04-06 21:01:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:59,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [6384578] [2022-04-06 21:01:59,479 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:59,479 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash -19535959, now seen corresponding path program 18 times [2022-04-06 21:01:59,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:59,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695604190] [2022-04-06 21:01:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:59,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:59,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:59,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695604190] [2022-04-06 21:01:59,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695604190] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:59,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8929675] [2022-04-06 21:01:59,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:59,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:59,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:59,607 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 21:01:59,608 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 21:01:59,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 21:01:59,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:59,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:01:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:59,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:00,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8929675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:00,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:00,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 21:02:00,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [6384578] [2022-04-06 21:02:00,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [6384578] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:00,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:00,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:02:00,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648270427] [2022-04-06 21:02:00,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:00,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:02:00,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:02:00,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:02:00,387 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:00,606 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-04-06 21:02:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:02:00,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:00,607 INFO L225 Difference]: With dead ends: 30 [2022-04-06 21:02:00,607 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 21:02:00,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=440, Invalid=682, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:02:00,609 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 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 21:02:00,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 21:02:00,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-04-06 21:02:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-04-06 21:02:00,614 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2022-04-06 21:02:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:00,614 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-04-06 21:02:00,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-04-06 21:02:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 21:02:00,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:00,615 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:00,630 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 21:02:00,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 21:02:00,822 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:00,822 INFO L85 PathProgramCache]: Analyzing trace with hash -605611658, now seen corresponding path program 17 times [2022-04-06 21:02:00,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:00,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1694694740] [2022-04-06 21:02:00,823 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:00,823 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:00,823 INFO L85 PathProgramCache]: Analyzing trace with hash -605611658, now seen corresponding path program 18 times [2022-04-06 21:02:00,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:00,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132069473] [2022-04-06 21:02:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:00,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:00,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:00,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:00,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132069473] [2022-04-06 21:02:00,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132069473] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:00,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731588680] [2022-04-06 21:02:00,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:00,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:00,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:00,983 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 21:02:00,991 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 21:02:01,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 21:02:01,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:02:01,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:01,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:01,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731588680] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:01,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:01,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 23 [2022-04-06 21:02:01,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:01,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1694694740] [2022-04-06 21:02:01,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1694694740] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:01,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:01,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:02:01,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941716987] [2022-04-06 21:02:01,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:01,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:02:01,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:01,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:02:01,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:02:01,736 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:01,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:01,870 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-04-06 21:02:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:02:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 21:02:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:01,871 INFO L225 Difference]: With dead ends: 28 [2022-04-06 21:02:01,871 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 21:02:01,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=593, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:02:01,872 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:01,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 21:02:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 21:02:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-04-06 21:02:01,876 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2022-04-06 21:02:01,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:01,876 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-04-06 21:02:01,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-04-06 21:02:01,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 21:02:01,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:01,877 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:01,882 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 21:02:02,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:02,078 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash -605562839, now seen corresponding path program 19 times [2022-04-06 21:02:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:02,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1547971851] [2022-04-06 21:02:02,079 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:02,079 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash -605562839, now seen corresponding path program 20 times [2022-04-06 21:02:02,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:02,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072458578] [2022-04-06 21:02:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:02,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:02,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:02,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:02,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072458578] [2022-04-06 21:02:02,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072458578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:02,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47266818] [2022-04-06 21:02:02,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:02,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:02,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:02,220 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 21:02:02,224 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 21:02:02,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:02,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 21:02:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:02,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:03,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47266818] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:03,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:03,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 21:02:03,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:03,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1547971851] [2022-04-06 21:02:03,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1547971851] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:03,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:03,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:02:03,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727206490] [2022-04-06 21:02:03,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:03,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:02:03,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:03,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:02:03,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=398, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:02:03,078 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:03,282 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-04-06 21:02:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:02:03,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 21:02:03,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:03,283 INFO L225 Difference]: With dead ends: 31 [2022-04-06 21:02:03,283 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 21:02:03,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=527, Invalid=805, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:02:03,284 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:03,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 21:02:03,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-04-06 21:02:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-06 21:02:03,289 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2022-04-06 21:02:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:03,289 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-06 21:02:03,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-06 21:02:03,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 21:02:03,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:03,290 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:03,315 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 21:02:03,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:03,503 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:03,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:03,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1592575754, now seen corresponding path program 19 times [2022-04-06 21:02:03,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:03,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [164147655] [2022-04-06 21:02:03,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:03,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1592575754, now seen corresponding path program 20 times [2022-04-06 21:02:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:03,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702818484] [2022-04-06 21:02:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:03,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:03,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:03,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:03,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702818484] [2022-04-06 21:02:03,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702818484] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:03,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15490203] [2022-04-06 21:02:03,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:03,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:03,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:03,659 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 21:02:03,662 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 21:02:03,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:03,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 21:02:03,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:03,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:04,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15490203] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:04,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:04,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-04-06 21:02:04,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:04,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [164147655] [2022-04-06 21:02:04,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [164147655] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:04,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:04,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:02:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874110295] [2022-04-06 21:02:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:04,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:02:04,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:02:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:02:04,521 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:04,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:04,651 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-04-06 21:02:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:02:04,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:04,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:04,652 INFO L225 Difference]: With dead ends: 29 [2022-04-06 21:02:04,652 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 21:02:04,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=553, Invalid=707, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 21:02:04,653 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:04,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 21:02:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 21:02:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-04-06 21:02:04,657 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2022-04-06 21:02:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:04,657 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-04-06 21:02:04,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-04-06 21:02:04,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 21:02:04,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:04,658 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:04,676 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 21:02:04,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 21:02:04,868 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:04,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:04,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1592526935, now seen corresponding path program 21 times [2022-04-06 21:02:04,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:04,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [964148352] [2022-04-06 21:02:04,869 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:04,869 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:04,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1592526935, now seen corresponding path program 22 times [2022-04-06 21:02:04,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:04,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443893736] [2022-04-06 21:02:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:04,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:05,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:05,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:05,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443893736] [2022-04-06 21:02:05,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443893736] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:05,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438968885] [2022-04-06 21:02:05,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:05,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:05,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:05,023 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 21:02:05,051 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 21:02:05,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:05,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:05,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 21:02:05,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:05,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:06,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438968885] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:06,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 21:02:06,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:06,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [964148352] [2022-04-06 21:02:06,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [964148352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:06,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:02:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777851473] [2022-04-06 21:02:06,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:06,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:02:06,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:02:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=458, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:02:06,041 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:06,291 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-06 21:02:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:02:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:06,293 INFO L225 Difference]: With dead ends: 32 [2022-04-06 21:02:06,293 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 21:02:06,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=622, Invalid=938, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 21:02:06,294 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:06,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 21:02:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-04-06 21:02:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-04-06 21:02:06,299 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2022-04-06 21:02:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:06,299 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-04-06 21:02:06,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-04-06 21:02:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:02:06,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:06,300 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:06,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 21:02:06,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:02:06,504 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2123691658, now seen corresponding path program 21 times [2022-04-06 21:02:06,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:06,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140540286] [2022-04-06 21:02:06,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:06,506 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:06,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2123691658, now seen corresponding path program 22 times [2022-04-06 21:02:06,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:06,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349785292] [2022-04-06 21:02:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:06,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:06,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:06,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349785292] [2022-04-06 21:02:06,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349785292] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:06,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986942373] [2022-04-06 21:02:06,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:06,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:06,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:06,675 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 21:02:06,676 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 21:02:06,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:06,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:06,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 21:02:06,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:07,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:07,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986942373] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:07,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:07,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2022-04-06 21:02:07,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:07,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140540286] [2022-04-06 21:02:07,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140540286] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:07,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:07,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:02:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940598291] [2022-04-06 21:02:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:07,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:02:07,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:02:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:02:07,752 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:07,914 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-04-06 21:02:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:02:07,915 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 21:02:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:07,915 INFO L225 Difference]: With dead ends: 30 [2022-04-06 21:02:07,915 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 21:02:07,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=651, Invalid=831, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:02:07,916 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:07,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 21:02:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 21:02:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-04-06 21:02:07,920 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2022-04-06 21:02:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:07,920 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-04-06 21:02:07,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-04-06 21:02:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:02:07,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:07,921 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:07,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 21:02:08,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:08,126 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:08,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2123642839, now seen corresponding path program 23 times [2022-04-06 21:02:08,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:08,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29608563] [2022-04-06 21:02:08,127 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:08,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2123642839, now seen corresponding path program 24 times [2022-04-06 21:02:08,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:08,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389027302] [2022-04-06 21:02:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:08,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:08,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:08,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:08,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389027302] [2022-04-06 21:02:08,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389027302] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240552189] [2022-04-06 21:02:08,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:08,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:08,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:08,300 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 21:02:08,303 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 21:02:08,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:02:08,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:02:08,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:08,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:09,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240552189] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:09,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:09,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 21:02:09,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:09,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29608563] [2022-04-06 21:02:09,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29608563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:09,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:09,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:02:09,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289954554] [2022-04-06 21:02:09,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:09,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:02:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:02:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=522, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:02:09,316 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:09,584 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-04-06 21:02:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:02:09,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 21:02:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:09,585 INFO L225 Difference]: With dead ends: 33 [2022-04-06 21:02:09,585 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 21:02:09,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=725, Invalid=1081, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:02:09,586 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 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 21:02:09,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 21:02:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-04-06 21:02:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-04-06 21:02:09,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2022-04-06 21:02:09,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:09,591 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-04-06 21:02:09,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-04-06 21:02:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 21:02:09,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:09,592 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:09,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 21:02:09,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:09,796 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:09,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1408415498, now seen corresponding path program 23 times [2022-04-06 21:02:09,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:09,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2036907326] [2022-04-06 21:02:09,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:09,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1408415498, now seen corresponding path program 24 times [2022-04-06 21:02:09,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:09,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606839598] [2022-04-06 21:02:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:09,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:09,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:09,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606839598] [2022-04-06 21:02:09,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606839598] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708761332] [2022-04-06 21:02:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:09,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:09,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:09,975 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 21:02:09,975 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 21:02:10,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:02:10,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:10,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:02:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:10,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:11,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708761332] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:11,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:11,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 29 [2022-04-06 21:02:11,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:11,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2036907326] [2022-04-06 21:02:11,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2036907326] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:11,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:11,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:02:11,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968522833] [2022-04-06 21:02:11,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:11,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:02:11,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:02:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:02:11,110 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:11,317 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-04-06 21:02:11,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:02:11,317 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:11,317 INFO L225 Difference]: With dead ends: 31 [2022-04-06 21:02:11,317 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 21:02:11,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 13 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=965, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 21:02:11,318 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:11,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 21:02:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 21:02:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-04-06 21:02:11,322 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2022-04-06 21:02:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:11,322 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-04-06 21:02:11,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-04-06 21:02:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 21:02:11,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:11,323 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:11,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:11,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 21:02:11,527 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:11,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1408366679, now seen corresponding path program 25 times [2022-04-06 21:02:11,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:11,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [993185266] [2022-04-06 21:02:11,528 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:11,529 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:11,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1408366679, now seen corresponding path program 26 times [2022-04-06 21:02:11,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:11,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749405917] [2022-04-06 21:02:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:11,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:11,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:11,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:11,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749405917] [2022-04-06 21:02:11,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749405917] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:11,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585035498] [2022-04-06 21:02:11,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:11,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:11,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:11,708 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 21:02:11,709 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 21:02:12,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:12,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:12,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 21:02:12,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:12,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:13,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585035498] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:13,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:13,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 21:02:13,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:13,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [993185266] [2022-04-06 21:02:13,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [993185266] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:13,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:13,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:02:13,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743524909] [2022-04-06 21:02:13,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:13,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:02:13,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:02:13,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=590, Unknown=0, NotChecked=0, Total=992 [2022-04-06 21:02:13,253 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:13,552 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-04-06 21:02:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:02:13,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:13,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:13,553 INFO L225 Difference]: With dead ends: 34 [2022-04-06 21:02:13,553 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 21:02:13,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 12 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 21:02:13,554 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:13,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 21:02:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-04-06 21:02:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-04-06 21:02:13,558 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2022-04-06 21:02:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:13,559 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-04-06 21:02:13,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-04-06 21:02:13,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 21:02:13,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:13,559 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:13,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:13,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 21:02:13,767 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash -709691018, now seen corresponding path program 25 times [2022-04-06 21:02:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1455281333] [2022-04-06 21:02:13,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:13,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash -709691018, now seen corresponding path program 26 times [2022-04-06 21:02:13,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:13,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328491163] [2022-04-06 21:02:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:13,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:13,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:13,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:13,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328491163] [2022-04-06 21:02:13,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328491163] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:13,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052122016] [2022-04-06 21:02:13,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:13,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:13,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:13,971 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 21:02:13,998 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 21:02:14,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:14,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 21:02:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:14,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:15,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052122016] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:15,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:15,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 31 [2022-04-06 21:02:15,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:15,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1455281333] [2022-04-06 21:02:15,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1455281333] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:15,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:15,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:02:15,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967846324] [2022-04-06 21:02:15,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:15,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:02:15,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:15,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:02:15,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:02:15,233 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:15,412 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-06 21:02:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:02:15,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 21:02:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:15,413 INFO L225 Difference]: With dead ends: 32 [2022-04-06 21:02:15,413 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 21:02:15,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 14 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=871, Invalid=1109, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:02:15,414 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:15,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 21:02:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 21:02:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-04-06 21:02:15,418 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2022-04-06 21:02:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:15,418 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-04-06 21:02:15,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-04-06 21:02:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 21:02:15,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:15,419 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:15,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 21:02:15,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 21:02:15,627 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:15,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:15,628 INFO L85 PathProgramCache]: Analyzing trace with hash -709642199, now seen corresponding path program 27 times [2022-04-06 21:02:15,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:15,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [22540857] [2022-04-06 21:02:15,629 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:15,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:15,629 INFO L85 PathProgramCache]: Analyzing trace with hash -709642199, now seen corresponding path program 28 times [2022-04-06 21:02:15,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:15,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034091418] [2022-04-06 21:02:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:15,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:15,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:15,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:15,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034091418] [2022-04-06 21:02:15,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034091418] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:15,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914662261] [2022-04-06 21:02:15,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:15,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:15,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:15,840 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 21:02:15,841 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 21:02:16,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:16,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 21:02:16,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:16,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:17,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914662261] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:17,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:17,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 21:02:17,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:17,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [22540857] [2022-04-06 21:02:17,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [22540857] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:17,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:17,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:02:17,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490900587] [2022-04-06 21:02:17,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:17,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:02:17,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:17,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:02:17,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=662, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:02:17,505 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:17,804 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-04-06 21:02:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:02:17,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 21:02:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:17,805 INFO L225 Difference]: With dead ends: 35 [2022-04-06 21:02:17,805 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 21:02:17,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=1397, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:02:17,806 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:17,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 21:02:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-04-06 21:02:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-04-06 21:02:17,811 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2022-04-06 21:02:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:17,811 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-04-06 21:02:17,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-04-06 21:02:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 21:02:17,811 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:17,812 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:17,833 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 21:02:18,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 21:02:18,027 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash -524068618, now seen corresponding path program 27 times [2022-04-06 21:02:18,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:18,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [412463921] [2022-04-06 21:02:18,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:18,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash -524068618, now seen corresponding path program 28 times [2022-04-06 21:02:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:18,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277759731] [2022-04-06 21:02:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:18,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:18,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:18,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277759731] [2022-04-06 21:02:18,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277759731] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026046876] [2022-04-06 21:02:18,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:18,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:18,261 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 21:02:18,262 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 21:02:18,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 21:02:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:18,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:19,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026046876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:19,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:19,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2022-04-06 21:02:19,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:19,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [412463921] [2022-04-06 21:02:19,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [412463921] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:19,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:19,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:02:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938449697] [2022-04-06 21:02:19,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:19,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:02:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:02:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:02:19,523 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:19,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:19,730 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-04-06 21:02:19,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:02:19,730 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:19,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:19,731 INFO L225 Difference]: With dead ends: 33 [2022-04-06 21:02:19,731 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 21:02:19,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 15 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=993, Invalid=1263, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 21:02:19,732 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:19,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:19,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 21:02:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 21:02:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-04-06 21:02:19,737 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2022-04-06 21:02:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:19,737 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-04-06 21:02:19,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-04-06 21:02:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 21:02:19,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:19,737 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:19,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:19,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 21:02:19,938 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash -524019799, now seen corresponding path program 29 times [2022-04-06 21:02:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:19,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690036922] [2022-04-06 21:02:19,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:19,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash -524019799, now seen corresponding path program 30 times [2022-04-06 21:02:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:19,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046751042] [2022-04-06 21:02:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:19,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:20,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:20,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046751042] [2022-04-06 21:02:20,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046751042] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458171540] [2022-04-06 21:02:20,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:20,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:20,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:20,166 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 21:02:20,167 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 21:02:20,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 21:02:20,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 21:02:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:20,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:21,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458171540] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:21,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:21,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 21:02:21,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:21,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690036922] [2022-04-06 21:02:21,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690036922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:21,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:21,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:02:21,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279493225] [2022-04-06 21:02:21,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:21,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:02:21,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:21,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:02:21,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=738, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 21:02:21,686 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:22,066 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-04-06 21:02:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:02:22,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:22,067 INFO L225 Difference]: With dead ends: 36 [2022-04-06 21:02:22,067 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 21:02:22,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1082, Invalid=1570, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 21:02:22,068 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:22,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 21:02:22,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-04-06 21:02:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-04-06 21:02:22,073 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2022-04-06 21:02:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:22,073 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-04-06 21:02:22,073 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-04-06 21:02:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 21:02:22,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:22,074 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:22,079 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 21:02:22,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:22,279 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:22,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:22,279 INFO L85 PathProgramCache]: Analyzing trace with hash 935258486, now seen corresponding path program 29 times [2022-04-06 21:02:22,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:22,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [995362165] [2022-04-06 21:02:22,280 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:22,280 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash 935258486, now seen corresponding path program 30 times [2022-04-06 21:02:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:22,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175581545] [2022-04-06 21:02:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:22,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:22,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:22,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175581545] [2022-04-06 21:02:22,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175581545] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:22,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686342714] [2022-04-06 21:02:22,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:22,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:22,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:22,540 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 21:02:22,542 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 21:02:22,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 21:02:22,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:22,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 21:02:22,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:23,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:24,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686342714] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:24,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:24,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 35 [2022-04-06 21:02:24,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:24,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [995362165] [2022-04-06 21:02:24,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [995362165] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:24,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:24,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:02:24,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370477772] [2022-04-06 21:02:24,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:24,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:02:24,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:02:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:02:24,114 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:24,318 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-04-06 21:02:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:02:24,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 21:02:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:24,319 INFO L225 Difference]: With dead ends: 34 [2022-04-06 21:02:24,319 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 21:02:24,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 16 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1123, Invalid=1427, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:02:24,320 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:24,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 21:02:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 21:02:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-04-06 21:02:24,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2022-04-06 21:02:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:24,324 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-04-06 21:02:24,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-04-06 21:02:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 21:02:24,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:24,325 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:24,329 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 21:02:24,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 21:02:24,527 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash 935307305, now seen corresponding path program 31 times [2022-04-06 21:02:24,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:24,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [197019957] [2022-04-06 21:02:24,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:24,529 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:24,529 INFO L85 PathProgramCache]: Analyzing trace with hash 935307305, now seen corresponding path program 32 times [2022-04-06 21:02:24,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:24,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004634056] [2022-04-06 21:02:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:24,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:24,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:24,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004634056] [2022-04-06 21:02:24,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004634056] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276843341] [2022-04-06 21:02:24,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:24,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:24,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:24,804 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 21:02:24,807 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 21:02:25,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:25,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:25,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 21:02:25,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:25,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:26,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276843341] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:26,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:26,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 21:02:26,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:26,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [197019957] [2022-04-06 21:02:26,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [197019957] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:26,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:26,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:02:26,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393133440] [2022-04-06 21:02:26,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:26,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:02:26,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:26,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:02:26,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=818, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 21:02:26,401 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:26,762 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-04-06 21:02:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:02:26,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 21:02:26,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:26,763 INFO L225 Difference]: With dead ends: 37 [2022-04-06 21:02:26,763 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 21:02:26,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 15 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1217, Invalid=1753, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:02:26,765 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:26,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:26,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 21:02:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-04-06 21:02:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-04-06 21:02:26,772 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2022-04-06 21:02:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:26,772 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-04-06 21:02:26,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-04-06 21:02:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 21:02:26,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:26,773 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:26,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:26,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:26,997 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:26,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1070241546, now seen corresponding path program 31 times [2022-04-06 21:02:26,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:26,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1341914469] [2022-04-06 21:02:26,999 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:26,999 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1070241546, now seen corresponding path program 32 times [2022-04-06 21:02:26,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:26,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276252786] [2022-04-06 21:02:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:26,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:27,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:27,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:27,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276252786] [2022-04-06 21:02:27,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276252786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:27,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583362886] [2022-04-06 21:02:27,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:27,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:27,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:27,251 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 21:02:27,252 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 21:02:27,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:27,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:27,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 21:02:27,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:27,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:28,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583362886] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:28,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:28,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 37 [2022-04-06 21:02:28,904 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:28,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1341914469] [2022-04-06 21:02:28,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1341914469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:28,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:28,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:02:28,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062964841] [2022-04-06 21:02:28,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:28,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:02:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:02:28,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:02:28,906 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:29,117 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-04-06 21:02:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:02:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:29,117 INFO L225 Difference]: With dead ends: 35 [2022-04-06 21:02:29,117 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 21:02:29,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 17 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1261, Invalid=1601, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 21:02:29,118 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 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 21:02:29,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 21:02:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 21:02:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-06 21:02:29,123 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2022-04-06 21:02:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:29,123 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-06 21:02:29,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-06 21:02:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 21:02:29,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:29,124 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:29,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:29,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:29,327 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1070192727, now seen corresponding path program 33 times [2022-04-06 21:02:29,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:29,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665849022] [2022-04-06 21:02:29,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:29,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1070192727, now seen corresponding path program 34 times [2022-04-06 21:02:29,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:29,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230278694] [2022-04-06 21:02:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:29,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:29,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:29,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:29,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230278694] [2022-04-06 21:02:29,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230278694] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:29,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186169451] [2022-04-06 21:02:29,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:29,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:29,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:29,577 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 21:02:29,578 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 21:02:29,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:29,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 21:02:29,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:30,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:31,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186169451] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:31,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:31,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 21:02:31,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665849022] [2022-04-06 21:02:31,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665849022] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:31,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:31,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:02:31,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838134181] [2022-04-06 21:02:31,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:31,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:02:31,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:31,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:02:31,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=902, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 21:02:31,135 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:31,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:31,526 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-04-06 21:02:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:02:31,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:31,527 INFO L225 Difference]: With dead ends: 38 [2022-04-06 21:02:31,527 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 21:02:31,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 16 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1360, Invalid=1946, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 21:02:31,529 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:31,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 21:02:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-04-06 21:02:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-04-06 21:02:31,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2022-04-06 21:02:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:31,532 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-04-06 21:02:31,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-04-06 21:02:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 21:02:31,533 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:31,533 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:31,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 21:02:31,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 21:02:31,734 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1183766902, now seen corresponding path program 33 times [2022-04-06 21:02:31,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:31,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1703264083] [2022-04-06 21:02:31,735 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:31,735 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:31,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1183766902, now seen corresponding path program 34 times [2022-04-06 21:02:31,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:31,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651270316] [2022-04-06 21:02:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:31,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:32,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:32,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651270316] [2022-04-06 21:02:32,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651270316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:32,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002123820] [2022-04-06 21:02:32,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:32,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:32,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:32,012 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 21:02:32,013 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 21:02:33,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:33,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:33,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 21:02:33,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:33,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:35,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002123820] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:35,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:35,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 39 [2022-04-06 21:02:35,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1703264083] [2022-04-06 21:02:35,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1703264083] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:35,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:35,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:02:35,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452272941] [2022-04-06 21:02:35,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:35,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:02:35,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:35,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:02:35,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:02:35,062 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:35,297 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-04-06 21:02:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:02:35,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 21:02:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:35,297 INFO L225 Difference]: With dead ends: 36 [2022-04-06 21:02:35,297 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 21:02:35,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 18 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1407, Invalid=1785, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:02:35,298 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:35,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 21:02:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 21:02:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-04-06 21:02:35,302 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2022-04-06 21:02:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:35,302 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-04-06 21:02:35,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-04-06 21:02:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 21:02:35,302 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:35,302 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:35,309 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 21:02:35,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 21:02:35,507 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1183815721, now seen corresponding path program 35 times [2022-04-06 21:02:35,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:35,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078119491] [2022-04-06 21:02:35,509 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:35,509 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1183815721, now seen corresponding path program 36 times [2022-04-06 21:02:35,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:35,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39833850] [2022-04-06 21:02:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:35,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:35,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:35,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39833850] [2022-04-06 21:02:35,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39833850] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646739894] [2022-04-06 21:02:35,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:35,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:35,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:35,765 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 21:02:35,766 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 21:02:36,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 21:02:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 21:02:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:37,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:38,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646739894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:38,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:38,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 21:02:38,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:38,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078119491] [2022-04-06 21:02:38,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078119491] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:38,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:38,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:02:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325714137] [2022-04-06 21:02:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:38,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:02:38,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:02:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=990, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 21:02:38,305 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:38,725 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-04-06 21:02:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:02:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 21:02:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:38,726 INFO L225 Difference]: With dead ends: 39 [2022-04-06 21:02:38,726 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 21:02:38,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 21 SyntacticMatches, 17 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1511, Invalid=2149, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 21:02:38,727 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:38,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 21:02:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-04-06 21:02:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-04-06 21:02:38,730 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2022-04-06 21:02:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:38,730 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-04-06 21:02:38,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-04-06 21:02:38,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 21:02:38,730 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:38,731 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:38,735 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 21:02:38,935 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,SelfDestructingSolverStorable35 [2022-04-06 21:02:38,935 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1956415242, now seen corresponding path program 35 times [2022-04-06 21:02:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:38,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1293174102] [2022-04-06 21:02:38,937 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:38,937 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1956415242, now seen corresponding path program 36 times [2022-04-06 21:02:38,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:38,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352729831] [2022-04-06 21:02:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:38,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:39,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:39,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352729831] [2022-04-06 21:02:39,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352729831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059103175] [2022-04-06 21:02:39,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:39,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:39,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:39,210 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 21:02:39,211 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 21:02:39,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 21:02:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:39,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 21:02:39,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:40,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:41,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059103175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:41,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:41,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 41 [2022-04-06 21:02:41,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:41,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1293174102] [2022-04-06 21:02:41,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1293174102] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:41,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:41,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:02:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103253743] [2022-04-06 21:02:41,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:41,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:02:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:02:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:02:41,659 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:41,913 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-04-06 21:02:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:02:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:41,914 INFO L225 Difference]: With dead ends: 37 [2022-04-06 21:02:41,914 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 21:02:41,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 19 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1561, Invalid=1979, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 21:02:41,915 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:41,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 21:02:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 21:02:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-04-06 21:02:41,919 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2022-04-06 21:02:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:41,919 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-04-06 21:02:41,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-04-06 21:02:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 21:02:41,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:41,919 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:41,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 21:02:42,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:42,123 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1956366423, now seen corresponding path program 37 times [2022-04-06 21:02:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:42,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1997636082] [2022-04-06 21:02:42,124 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:42,125 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:42,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1956366423, now seen corresponding path program 38 times [2022-04-06 21:02:42,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:42,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011923348] [2022-04-06 21:02:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:42,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:42,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:42,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:42,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011923348] [2022-04-06 21:02:42,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011923348] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:42,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854397393] [2022-04-06 21:02:42,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:42,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:42,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:42,394 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 21:02:42,394 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 21:02:42,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:42,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 21:02:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:42,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:44,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854397393] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:44,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:44,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 21:02:44,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:44,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1997636082] [2022-04-06 21:02:44,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1997636082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:44,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:44,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:02:44,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666948636] [2022-04-06 21:02:44,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:44,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:02:44,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:02:44,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=810, Invalid=1082, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 21:02:44,263 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:44,725 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-04-06 21:02:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:02:44,725 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:44,726 INFO L225 Difference]: With dead ends: 40 [2022-04-06 21:02:44,726 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 21:02:44,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 18 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1670, Invalid=2362, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 21:02:44,727 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:44,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:44,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 21:02:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-04-06 21:02:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-04-06 21:02:44,730 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2022-04-06 21:02:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:44,731 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-04-06 21:02:44,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-04-06 21:02:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 21:02:44,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:44,731 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:44,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 21:02:44,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 21:02:44,935 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash -517813898, now seen corresponding path program 37 times [2022-04-06 21:02:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:44,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1903162922] [2022-04-06 21:02:44,937 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:44,937 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:44,937 INFO L85 PathProgramCache]: Analyzing trace with hash -517813898, now seen corresponding path program 38 times [2022-04-06 21:02:44,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:44,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304338218] [2022-04-06 21:02:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:45,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:45,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:45,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304338218] [2022-04-06 21:02:45,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304338218] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:45,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49999012] [2022-04-06 21:02:45,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:45,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:45,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:45,266 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 21:02:45,267 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 21:02:45,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:45,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:45,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 21:02:45,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:45,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:47,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49999012] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:47,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:47,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 43 [2022-04-06 21:02:47,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:47,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1903162922] [2022-04-06 21:02:47,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1903162922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:47,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:47,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:02:47,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686141694] [2022-04-06 21:02:47,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:47,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:02:47,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:47,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:02:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:02:47,312 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:47,596 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-04-06 21:02:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:02:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 21:02:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:47,597 INFO L225 Difference]: With dead ends: 38 [2022-04-06 21:02:47,597 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 21:02:47,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 20 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1723, Invalid=2183, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 21:02:47,598 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:47,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 21:02:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 21:02:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-04-06 21:02:47,602 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2022-04-06 21:02:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:47,602 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-04-06 21:02:47,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-04-06 21:02:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 21:02:47,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:47,602 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:47,608 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 21:02:47,802 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,SelfDestructingSolverStorable38 [2022-04-06 21:02:47,803 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:47,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:47,803 INFO L85 PathProgramCache]: Analyzing trace with hash -517765079, now seen corresponding path program 39 times [2022-04-06 21:02:47,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:47,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [538771043] [2022-04-06 21:02:47,804 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:47,804 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:47,804 INFO L85 PathProgramCache]: Analyzing trace with hash -517765079, now seen corresponding path program 40 times [2022-04-06 21:02:47,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:47,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570439109] [2022-04-06 21:02:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:47,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:48,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:48,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:48,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570439109] [2022-04-06 21:02:48,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570439109] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:48,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11077892] [2022-04-06 21:02:48,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:48,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:48,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:48,076 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 21:02:48,077 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 21:02:48,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:48,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:48,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 21:02:48,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:48,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:49,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11077892] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:49,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:49,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 21:02:49,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:49,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [538771043] [2022-04-06 21:02:49,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [538771043] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:49,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:49,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 21:02:49,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709411368] [2022-04-06 21:02:49,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:49,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 21:02:49,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:49,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 21:02:49,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=1178, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 21:02:49,986 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:50,479 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-04-06 21:02:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:02:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 21:02:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:50,480 INFO L225 Difference]: With dead ends: 41 [2022-04-06 21:02:50,480 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 21:02:50,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 19 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1837, Invalid=2585, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 21:02:50,481 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:50,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 21:02:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-04-06 21:02:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-04-06 21:02:50,484 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2022-04-06 21:02:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:50,484 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-04-06 21:02:50,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-04-06 21:02:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 21:02:50,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:50,485 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:50,501 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 21:02:50,688 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,SelfDestructingSolverStorable39 [2022-04-06 21:02:50,688 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:50,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:50,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1129154806, now seen corresponding path program 39 times [2022-04-06 21:02:50,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:50,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154846723] [2022-04-06 21:02:50,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:50,689 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1129154806, now seen corresponding path program 40 times [2022-04-06 21:02:50,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:50,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236814157] [2022-04-06 21:02:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:50,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:51,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:51,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:51,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236814157] [2022-04-06 21:02:51,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236814157] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:51,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752805053] [2022-04-06 21:02:51,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:51,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:51,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:51,009 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 21:02:51,009 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 21:02:51,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:51,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:51,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 21:02:51,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:51,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752805053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:53,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:53,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 45 [2022-04-06 21:02:53,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1154846723] [2022-04-06 21:02:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1154846723] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:53,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:53,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 21:02:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512253255] [2022-04-06 21:02:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:53,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 21:02:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 21:02:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:02:53,107 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:53,396 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-04-06 21:02:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:02:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:53,397 INFO L225 Difference]: With dead ends: 39 [2022-04-06 21:02:53,397 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 21:02:53,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 23 SyntacticMatches, 21 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1893, Invalid=2397, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:02:53,398 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:53,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 21:02:53,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 21:02:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-04-06 21:02:53,403 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2022-04-06 21:02:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:53,403 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-04-06 21:02:53,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-04-06 21:02:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 21:02:53,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:53,404 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:53,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:53,611 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,SelfDestructingSolverStorable40 [2022-04-06 21:02:53,611 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1129203625, now seen corresponding path program 41 times [2022-04-06 21:02:53,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:53,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1216193605] [2022-04-06 21:02:53,613 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:53,613 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:53,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1129203625, now seen corresponding path program 42 times [2022-04-06 21:02:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:53,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455582519] [2022-04-06 21:02:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:53,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:53,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:53,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455582519] [2022-04-06 21:02:53,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455582519] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:53,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100471338] [2022-04-06 21:02:53,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:53,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:53,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:53,909 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 21:02:53,909 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 21:02:54,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 21:02:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 21:02:54,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:55,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:56,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100471338] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:56,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:56,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 21:02:56,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:56,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1216193605] [2022-04-06 21:02:56,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1216193605] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:56,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:56,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:02:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996567149] [2022-04-06 21:02:56,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:56,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:02:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:02:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=1278, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 21:02:56,952 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:57,488 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-04-06 21:02:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 21:02:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:02:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:57,489 INFO L225 Difference]: With dead ends: 42 [2022-04-06 21:02:57,489 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 21:02:57,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 20 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2012, Invalid=2818, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 21:02:57,490 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:57,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 21:02:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-04-06 21:02:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-04-06 21:02:57,493 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2022-04-06 21:02:57,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:57,494 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-04-06 21:02:57,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:57,494 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-04-06 21:02:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:02:57,494 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:57,494 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:57,499 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 21:02:57,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:57,695 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash 645577078, now seen corresponding path program 41 times [2022-04-06 21:02:57,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:57,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130633955] [2022-04-06 21:02:57,696 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:57,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:57,697 INFO L85 PathProgramCache]: Analyzing trace with hash 645577078, now seen corresponding path program 42 times [2022-04-06 21:02:57,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:57,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206850539] [2022-04-06 21:02:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:57,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:58,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:58,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:58,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206850539] [2022-04-06 21:02:58,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206850539] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:58,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407098389] [2022-04-06 21:02:58,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:58,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:58,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:58,018 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 21:02:58,019 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 21:02:59,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 21:02:59,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:59,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 21:02:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:59,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:01,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407098389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:01,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:01,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 47 [2022-04-06 21:03:01,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:01,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130633955] [2022-04-06 21:03:01,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130633955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:01,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:01,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:03:01,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053637345] [2022-04-06 21:03:01,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:01,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:03:01,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:03:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:03:01,682 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:02,004 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-04-06 21:03:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 21:03:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 21:03:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:02,004 INFO L225 Difference]: With dead ends: 40 [2022-04-06 21:03:02,004 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 21:03:02,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 23 SyntacticMatches, 22 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2071, Invalid=2621, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 21:03:02,006 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:02,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 21:03:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 21:03:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-04-06 21:03:02,010 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2022-04-06 21:03:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:02,011 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-04-06 21:03:02,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-04-06 21:03:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:03:02,011 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:02,011 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:02,021 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 21:03:02,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:02,217 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:02,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:02,217 INFO L85 PathProgramCache]: Analyzing trace with hash 645625897, now seen corresponding path program 43 times [2022-04-06 21:03:02,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:02,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29323379] [2022-04-06 21:03:02,218 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:02,218 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash 645625897, now seen corresponding path program 44 times [2022-04-06 21:03:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:02,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694086325] [2022-04-06 21:03:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:02,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:02,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:02,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:02,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694086325] [2022-04-06 21:03:02,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694086325] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:02,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287758177] [2022-04-06 21:03:02,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:02,559 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 21:03:02,560 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 21:03:02,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 21:03:02,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:03,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:04,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287758177] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:04,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:04,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 21:03:04,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29323379] [2022-04-06 21:03:04,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29323379] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:04,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:04,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 21:03:04,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672366113] [2022-04-06 21:03:04,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:04,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 21:03:04,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 21:03:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1068, Invalid=1382, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 21:03:04,764 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:05,324 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-04-06 21:03:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:03:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 21:03:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:05,325 INFO L225 Difference]: With dead ends: 43 [2022-04-06 21:03:05,325 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 21:03:05,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 21 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2195, Invalid=3061, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 21:03:05,326 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:05,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 21:03:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-04-06 21:03:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-04-06 21:03:05,330 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2022-04-06 21:03:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:05,330 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-04-06 21:03:05,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-04-06 21:03:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 21:03:05,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:05,331 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:05,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 21:03:05,531 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,SelfDestructingSolverStorable43 [2022-04-06 21:03:05,531 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1460430602, now seen corresponding path program 43 times [2022-04-06 21:03:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:05,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096833454] [2022-04-06 21:03:05,532 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:05,532 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:05,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1460430602, now seen corresponding path program 44 times [2022-04-06 21:03:05,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:05,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183762780] [2022-04-06 21:03:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:05,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:05,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:05,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:05,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183762780] [2022-04-06 21:03:05,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183762780] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:05,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185532969] [2022-04-06 21:03:05,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:05,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:05,932 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 21:03:05,933 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 21:03:06,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:06,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:06,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 21:03:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:06,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:08,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185532969] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:08,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:08,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 49 [2022-04-06 21:03:08,412 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096833454] [2022-04-06 21:03:08,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096833454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:08,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:08,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 21:03:08,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066411026] [2022-04-06 21:03:08,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:08,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 21:03:08,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:08,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 21:03:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:03:08,413 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:08,802 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-04-06 21:03:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:03:08,802 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:03:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:08,803 INFO L225 Difference]: With dead ends: 41 [2022-04-06 21:03:08,803 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 21:03:08,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 23 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2257, Invalid=2855, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 21:03:08,804 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:08,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 21:03:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 21:03:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-04-06 21:03:08,809 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2022-04-06 21:03:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:08,809 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-04-06 21:03:08,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-04-06 21:03:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 21:03:08,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:08,810 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:08,817 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 21:03:09,014 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,SelfDestructingSolverStorable44 [2022-04-06 21:03:09,015 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1460381783, now seen corresponding path program 45 times [2022-04-06 21:03:09,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:09,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168034264] [2022-04-06 21:03:09,016 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:09,016 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1460381783, now seen corresponding path program 46 times [2022-04-06 21:03:09,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:09,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286672764] [2022-04-06 21:03:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:09,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:09,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:09,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:09,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286672764] [2022-04-06 21:03:09,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286672764] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:09,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031568810] [2022-04-06 21:03:09,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:09,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:09,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:09,367 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 21:03:09,370 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 21:03:09,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:09,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 21:03:09,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:09,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:11,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031568810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:11,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:11,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 21:03:11,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:11,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168034264] [2022-04-06 21:03:11,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168034264] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:11,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:11,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:03:11,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141534733] [2022-04-06 21:03:11,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:11,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:03:11,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:11,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:03:11,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1162, Invalid=1490, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 21:03:11,818 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:12,433 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-04-06 21:03:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 21:03:12,433 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:03:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:12,434 INFO L225 Difference]: With dead ends: 44 [2022-04-06 21:03:12,434 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 21:03:12,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 21 SyntacticMatches, 22 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2386, Invalid=3314, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 21:03:12,435 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:12,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 21:03:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-04-06 21:03:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-04-06 21:03:12,440 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2022-04-06 21:03:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:12,440 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-04-06 21:03:12,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-04-06 21:03:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 21:03:12,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:12,441 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:12,444 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 21:03:12,643 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,SelfDestructingSolverStorable45 [2022-04-06 21:03:12,643 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1972808054, now seen corresponding path program 45 times [2022-04-06 21:03:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:12,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1649615081] [2022-04-06 21:03:12,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:12,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1972808054, now seen corresponding path program 46 times [2022-04-06 21:03:12,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:12,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157891513] [2022-04-06 21:03:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:12,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:13,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:13,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:13,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157891513] [2022-04-06 21:03:13,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157891513] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:13,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225722242] [2022-04-06 21:03:13,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:13,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:13,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:13,064 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 21:03:13,066 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 21:03:13,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:13,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:13,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 21:03:13,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:13,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:15,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225722242] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:15,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:15,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 51 [2022-04-06 21:03:15,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:15,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1649615081] [2022-04-06 21:03:15,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1649615081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:15,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:15,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:03:15,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144222281] [2022-04-06 21:03:15,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:15,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:03:15,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:03:15,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:03:15,680 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:16,054 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-04-06 21:03:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 21:03:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 21:03:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:16,054 INFO L225 Difference]: With dead ends: 42 [2022-04-06 21:03:16,054 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 21:03:16,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 24 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2451, Invalid=3099, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 21:03:16,055 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:16,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 21:03:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 21:03:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-04-06 21:03:16,060 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2022-04-06 21:03:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:16,060 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-04-06 21:03:16,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-04-06 21:03:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 21:03:16,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:16,061 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:16,078 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 21:03:16,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:16,267 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:16,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1972856873, now seen corresponding path program 47 times [2022-04-06 21:03:16,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:16,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649097559] [2022-04-06 21:03:16,269 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:16,269 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1972856873, now seen corresponding path program 48 times [2022-04-06 21:03:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:16,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946758628] [2022-04-06 21:03:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:16,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:16,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:16,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946758628] [2022-04-06 21:03:16,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946758628] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:16,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757304564] [2022-04-06 21:03:16,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:16,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:16,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:16,652 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 21:03:16,654 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 21:03:18,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 21:03:18,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:03:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:18,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:20,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757304564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:20,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:20,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 21:03:20,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649097559] [2022-04-06 21:03:20,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649097559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:20,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:20,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 21:03:20,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771944272] [2022-04-06 21:03:20,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:20,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 21:03:20,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 21:03:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=1602, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 21:03:20,606 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:21,218 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-04-06 21:03:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:03:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 21:03:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:21,219 INFO L225 Difference]: With dead ends: 45 [2022-04-06 21:03:21,219 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 21:03:21,220 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 23 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2585, Invalid=3577, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 21:03:21,220 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:21,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 21:03:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-04-06 21:03:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-04-06 21:03:21,224 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2022-04-06 21:03:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:21,225 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-04-06 21:03:21,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-04-06 21:03:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 21:03:21,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:21,225 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:21,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 21:03:21,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 21:03:21,430 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:21,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:21,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1029023990, now seen corresponding path program 47 times [2022-04-06 21:03:21,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:21,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1474985305] [2022-04-06 21:03:21,432 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:21,432 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1029023990, now seen corresponding path program 48 times [2022-04-06 21:03:21,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:21,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317632997] [2022-04-06 21:03:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:21,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:21,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:21,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317632997] [2022-04-06 21:03:21,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317632997] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:21,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228778375] [2022-04-06 21:03:21,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:21,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:21,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:21,889 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 21:03:21,890 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 21:03:24,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 21:03:24,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:24,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:03:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:25,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:27,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228778375] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:27,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:27,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 53 [2022-04-06 21:03:27,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1474985305] [2022-04-06 21:03:27,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1474985305] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:27,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:27,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 21:03:27,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62975726] [2022-04-06 21:03:27,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:27,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 21:03:27,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 21:03:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:03:27,658 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:28,049 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-04-06 21:03:28,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:03:28,050 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:03:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:28,050 INFO L225 Difference]: With dead ends: 43 [2022-04-06 21:03:28,050 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 21:03:28,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 23 SyntacticMatches, 25 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2653, Invalid=3353, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 21:03:28,051 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:28,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 21:03:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 21:03:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-04-06 21:03:28,056 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2022-04-06 21:03:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:28,057 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-04-06 21:03:28,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-04-06 21:03:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 21:03:28,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:28,057 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:28,063 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 21:03:28,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 21:03:28,258 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1029072809, now seen corresponding path program 49 times [2022-04-06 21:03:28,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:28,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919876197] [2022-04-06 21:03:28,259 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:28,259 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:28,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1029072809, now seen corresponding path program 50 times [2022-04-06 21:03:28,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:28,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578161543] [2022-04-06 21:03:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:28,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:28,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:28,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:28,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578161543] [2022-04-06 21:03:28,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578161543] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:28,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053857814] [2022-04-06 21:03:28,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:28,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:28,635 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 21:03:28,636 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 21:03:28,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:28,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:28,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 21:03:28,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:29,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:31,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053857814] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:31,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:31,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 21:03:31,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:31,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919876197] [2022-04-06 21:03:31,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919876197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:31,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:31,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:03:31,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510797886] [2022-04-06 21:03:31,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:31,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:03:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:31,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:03:31,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1362, Invalid=1718, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 21:03:31,404 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:32,092 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-04-06 21:03:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 21:03:32,093 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:03:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:32,093 INFO L225 Difference]: With dead ends: 46 [2022-04-06 21:03:32,093 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 21:03:32,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 21 SyntacticMatches, 24 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2792, Invalid=3850, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 21:03:32,094 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:32,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 21:03:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-04-06 21:03:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-04-06 21:03:32,098 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2022-04-06 21:03:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:32,098 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-04-06 21:03:32,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-04-06 21:03:32,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 21:03:32,099 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:32,099 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:32,118 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 21:03:32,307 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,SelfDestructingSolverStorable49 [2022-04-06 21:03:32,307 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1836489078, now seen corresponding path program 49 times [2022-04-06 21:03:32,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [119798607] [2022-04-06 21:03:32,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:32,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1836489078, now seen corresponding path program 50 times [2022-04-06 21:03:32,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:32,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725002633] [2022-04-06 21:03:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:32,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:32,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:32,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725002633] [2022-04-06 21:03:32,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725002633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:32,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035821450] [2022-04-06 21:03:32,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:32,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:32,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:32,740 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 21:03:32,741 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 21:03:32,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:32,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:32,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 21:03:32,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:33,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:35,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035821450] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:35,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:35,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 55 [2022-04-06 21:03:35,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:35,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [119798607] [2022-04-06 21:03:35,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [119798607] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:35,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:35,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:03:35,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638404946] [2022-04-06 21:03:35,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:35,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:03:35,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:35,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:03:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:03:35,814 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:36,245 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-04-06 21:03:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 21:03:36,245 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 21:03:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:36,246 INFO L225 Difference]: With dead ends: 44 [2022-04-06 21:03:36,246 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 21:03:36,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 23 SyntacticMatches, 26 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2863, Invalid=3617, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 21:03:36,247 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:36,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 21:03:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 21:03:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-04-06 21:03:36,252 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 36 [2022-04-06 21:03:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:36,252 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-04-06 21:03:36,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-04-06 21:03:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 21:03:36,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:36,253 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:36,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 21:03:36,453 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,SelfDestructingSolverStorable50 [2022-04-06 21:03:36,453 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:36,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1836537897, now seen corresponding path program 51 times [2022-04-06 21:03:36,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:36,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [857183241] [2022-04-06 21:03:36,454 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:36,455 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1836537897, now seen corresponding path program 52 times [2022-04-06 21:03:36,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:36,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182948298] [2022-04-06 21:03:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:36,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:36,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:36,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:36,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182948298] [2022-04-06 21:03:36,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182948298] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:36,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558789063] [2022-04-06 21:03:36,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:36,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:36,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:36,927 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 21:03:36,959 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 21:03:37,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:37,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:03:37,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:37,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:40,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558789063] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:40,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:40,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 21:03:40,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:40,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [857183241] [2022-04-06 21:03:40,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [857183241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:40,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:40,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 21:03:40,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556883415] [2022-04-06 21:03:40,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:40,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 21:03:40,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:40,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 21:03:40,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1468, Invalid=1838, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 21:03:40,038 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:40,738 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-04-06 21:03:40,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:03:40,738 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 21:03:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:40,739 INFO L225 Difference]: With dead ends: 47 [2022-04-06 21:03:40,739 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 21:03:40,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 21 SyntacticMatches, 25 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3007, Invalid=4133, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 21:03:40,740 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:40,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 21:03:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-04-06 21:03:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-04-06 21:03:40,746 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2022-04-06 21:03:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:40,746 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-04-06 21:03:40,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-04-06 21:03:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 21:03:40,746 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:40,746 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:40,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:40,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:40,951 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1098103030, now seen corresponding path program 51 times [2022-04-06 21:03:40,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:40,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1726615585] [2022-04-06 21:03:40,952 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:40,953 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1098103030, now seen corresponding path program 52 times [2022-04-06 21:03:40,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:40,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193948749] [2022-04-06 21:03:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:40,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:41,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:41,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:41,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193948749] [2022-04-06 21:03:41,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193948749] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:41,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949997389] [2022-04-06 21:03:41,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:41,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:41,411 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 21:03:41,418 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 21:03:42,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:42,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:42,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:03:42,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:42,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:45,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949997389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:45,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:45,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 57 [2022-04-06 21:03:45,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:45,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1726615585] [2022-04-06 21:03:45,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1726615585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:45,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:45,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 21:03:45,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22390270] [2022-04-06 21:03:45,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:45,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 21:03:45,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:45,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 21:03:45,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:03:45,312 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:45,730 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-04-06 21:03:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:03:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:03:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:45,731 INFO L225 Difference]: With dead ends: 45 [2022-04-06 21:03:45,731 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 21:03:45,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 23 SyntacticMatches, 27 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3891, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:03:45,732 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:45,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 21:03:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-04-06 21:03:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-04-06 21:03:45,736 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2022-04-06 21:03:45,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:45,737 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-04-06 21:03:45,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-04-06 21:03:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 21:03:45,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:45,737 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:45,742 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 21:03:45,942 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,SelfDestructingSolverStorable52 [2022-04-06 21:03:45,942 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:45,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1098151849, now seen corresponding path program 53 times [2022-04-06 21:03:45,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:45,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945957658] [2022-04-06 21:03:45,943 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:45,943 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:45,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1098151849, now seen corresponding path program 54 times [2022-04-06 21:03:45,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:45,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596572903] [2022-04-06 21:03:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:45,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:46,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:46,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596572903] [2022-04-06 21:03:46,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596572903] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255976918] [2022-04-06 21:03:46,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:46,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:46,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:46,438 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 21:03:46,439 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 21:03:52,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 21:03:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:52,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 21:03:52,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:53,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:56,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255976918] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:56,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:56,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 21:03:56,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:56,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945957658] [2022-04-06 21:03:56,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945957658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:56,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:56,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:03:56,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452170723] [2022-04-06 21:03:56,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:56,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:03:56,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:03:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1578, Invalid=1962, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 21:03:56,172 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:56,885 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-04-06 21:03:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 21:03:56,885 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:03:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:56,886 INFO L225 Difference]: With dead ends: 48 [2022-04-06 21:03:56,886 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 21:03:56,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 21 SyntacticMatches, 26 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3230, Invalid=4426, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 21:03:56,887 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:56,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:03:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 21:03:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-04-06 21:03:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-04-06 21:03:56,892 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2022-04-06 21:03:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:56,893 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-04-06 21:03:56,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-04-06 21:03:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 21:03:56,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:56,893 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:56,899 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 21:03:57,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:57,095 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash -317027978, now seen corresponding path program 53 times [2022-04-06 21:03:57,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:57,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1239468223] [2022-04-06 21:03:57,096 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:57,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:57,097 INFO L85 PathProgramCache]: Analyzing trace with hash -317027978, now seen corresponding path program 54 times [2022-04-06 21:03:57,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:57,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708929492] [2022-04-06 21:03:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:57,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:57,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708929492] [2022-04-06 21:03:57,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708929492] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701152221] [2022-04-06 21:03:57,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:57,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:57,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:57,547 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 21:03:57,547 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 21:04:03,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 21:04:03,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 21:04:03,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:04,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:07,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701152221] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:07,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:07,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 59 [2022-04-06 21:04:07,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:07,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1239468223] [2022-04-06 21:04:07,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1239468223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:07,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:07,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:04:07,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457713317] [2022-04-06 21:04:07,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:07,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:04:07,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:04:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:04:07,127 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:07,570 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-04-06 21:04:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 21:04:07,570 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 21:04:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:07,570 INFO L225 Difference]: With dead ends: 46 [2022-04-06 21:04:07,570 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 21:04:07,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 23 SyntacticMatches, 28 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3307, Invalid=4175, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 21:04:07,571 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:07,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 21:04:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 21:04:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-04-06 21:04:07,575 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2022-04-06 21:04:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:07,575 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-04-06 21:04:07,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-04-06 21:04:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 21:04:07,576 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:07,576 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:07,583 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 21:04:07,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:07,782 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:07,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash -316979159, now seen corresponding path program 55 times [2022-04-06 21:04:07,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:07,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [419142009] [2022-04-06 21:04:07,783 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:07,783 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash -316979159, now seen corresponding path program 56 times [2022-04-06 21:04:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:07,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447845301] [2022-04-06 21:04:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:08,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:08,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:08,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447845301] [2022-04-06 21:04:08,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447845301] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:08,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935241910] [2022-04-06 21:04:08,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:08,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:08,293 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 21:04:08,294 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 21:04:08,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:08,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:08,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:04:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:09,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:11,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935241910] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:11,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:11,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 21:04:11,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [419142009] [2022-04-06 21:04:11,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [419142009] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:11,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:11,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 21:04:11,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626191493] [2022-04-06 21:04:11,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:11,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 21:04:11,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:11,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 21:04:11,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1692, Invalid=2090, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 21:04:11,690 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:12,470 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-04-06 21:04:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:04:12,471 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 21:04:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:12,471 INFO L225 Difference]: With dead ends: 49 [2022-04-06 21:04:12,471 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 21:04:12,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 21 SyntacticMatches, 27 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3461, Invalid=4729, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 21:04:12,472 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:12,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 21:04:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-04-06 21:04:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-04-06 21:04:12,477 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2022-04-06 21:04:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:12,477 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-04-06 21:04:12,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-04-06 21:04:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 21:04:12,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:12,478 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:12,494 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 21:04:12,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:12,678 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:12,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:12,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1236416266, now seen corresponding path program 55 times [2022-04-06 21:04:12,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:12,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223136353] [2022-04-06 21:04:12,679 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:12,679 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:12,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1236416266, now seen corresponding path program 56 times [2022-04-06 21:04:12,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:12,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292773652] [2022-04-06 21:04:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:12,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:13,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:13,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292773652] [2022-04-06 21:04:13,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292773652] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301900692] [2022-04-06 21:04:13,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:13,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:13,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:13,226 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 21:04:13,227 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 21:04:13,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:13,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:04:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:13,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:16,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301900692] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:16,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:16,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 61 [2022-04-06 21:04:16,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:16,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223136353] [2022-04-06 21:04:16,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223136353] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:16,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:16,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 21:04:16,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028990593] [2022-04-06 21:04:16,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:16,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 21:04:16,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:16,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 21:04:16,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 21:04:16,958 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:17,426 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-04-06 21:04:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:04:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:04:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:17,427 INFO L225 Difference]: With dead ends: 47 [2022-04-06 21:04:17,427 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 21:04:17,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 23 SyntacticMatches, 29 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3541, Invalid=4469, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:04:17,429 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:17,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 21:04:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 21:04:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-04-06 21:04:17,434 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 39 [2022-04-06 21:04:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:17,434 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-04-06 21:04:17,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-04-06 21:04:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 21:04:17,435 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:17,435 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:17,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 21:04:17,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:17,643 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:17,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:17,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1236367447, now seen corresponding path program 57 times [2022-04-06 21:04:17,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [696008526] [2022-04-06 21:04:17,645 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:17,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1236367447, now seen corresponding path program 58 times [2022-04-06 21:04:17,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:17,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090360460] [2022-04-06 21:04:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:17,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090360460] [2022-04-06 21:04:18,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090360460] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582419660] [2022-04-06 21:04:18,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:18,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:18,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:18,218 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 21:04:18,236 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 21:04:18,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:18,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 21:04:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:19,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582419660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:21,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 21:04:21,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [696008526] [2022-04-06 21:04:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [696008526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:21,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:04:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715050044] [2022-04-06 21:04:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:21,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:04:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:04:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1810, Invalid=2222, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 21:04:21,957 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:22,769 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-04-06 21:04:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 21:04:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:04:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:22,770 INFO L225 Difference]: With dead ends: 50 [2022-04-06 21:04:22,770 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 21:04:22,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 21 SyntacticMatches, 28 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3700, Invalid=5042, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 21:04:22,771 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:22,771 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 21:04:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-04-06 21:04:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-04-06 21:04:22,775 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2022-04-06 21:04:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:22,775 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-04-06 21:04:22,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-04-06 21:04:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 21:04:22,775 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:22,775 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:22,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:22,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-04-06 21:04:22,976 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:22,976 INFO L85 PathProgramCache]: Analyzing trace with hash 327317878, now seen corresponding path program 57 times [2022-04-06 21:04:22,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:22,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [764338178] [2022-04-06 21:04:22,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:22,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:22,977 INFO L85 PathProgramCache]: Analyzing trace with hash 327317878, now seen corresponding path program 58 times [2022-04-06 21:04:22,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:22,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084911048] [2022-04-06 21:04:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:22,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:23,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:23,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:23,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084911048] [2022-04-06 21:04:23,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084911048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:23,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124915605] [2022-04-06 21:04:23,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:23,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:23,489 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 21:04:23,490 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 21:04:23,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:23,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 21:04:23,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:24,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:27,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124915605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:27,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:27,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 63 [2022-04-06 21:04:27,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:27,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [764338178] [2022-04-06 21:04:27,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [764338178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:27,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:27,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:04:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051164222] [2022-04-06 21:04:27,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:27,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:04:27,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:04:27,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 21:04:27,362 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:27,868 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-04-06 21:04:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 21:04:27,870 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 21:04:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:27,871 INFO L225 Difference]: With dead ends: 48 [2022-04-06 21:04:27,871 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 21:04:27,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 23 SyntacticMatches, 30 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3783, Invalid=4773, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 21:04:27,872 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:27,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 21:04:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 21:04:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-04-06 21:04:27,876 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2022-04-06 21:04:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:27,876 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-04-06 21:04:27,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-04-06 21:04:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 21:04:27,876 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:27,876 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:27,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 21:04:28,077 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,SelfDestructingSolverStorable58 [2022-04-06 21:04:28,077 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:28,077 INFO L85 PathProgramCache]: Analyzing trace with hash 327366697, now seen corresponding path program 59 times [2022-04-06 21:04:28,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:28,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048972098] [2022-04-06 21:04:28,078 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:28,078 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:28,079 INFO L85 PathProgramCache]: Analyzing trace with hash 327366697, now seen corresponding path program 60 times [2022-04-06 21:04:28,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:28,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918855470] [2022-04-06 21:04:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:28,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:28,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:28,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:28,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918855470] [2022-04-06 21:04:28,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918855470] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:28,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231109672] [2022-04-06 21:04:28,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:28,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:28,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:28,573 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 21:04:28,573 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 21:04:45,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 21:04:45,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:04:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:45,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:48,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231109672] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:48,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:48,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 21:04:48,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:48,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048972098] [2022-04-06 21:04:48,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048972098] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:48,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:48,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 21:04:48,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806310130] [2022-04-06 21:04:48,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:48,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 21:04:48,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 21:04:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1932, Invalid=2358, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:04:48,956 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:49,818 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-04-06 21:04:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:04:49,819 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 21:04:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:49,819 INFO L225 Difference]: With dead ends: 51 [2022-04-06 21:04:49,819 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 21:04:49,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 21 SyntacticMatches, 29 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3947, Invalid=5365, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 21:04:49,821 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:49,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 21:04:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-04-06 21:04:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-04-06 21:04:49,827 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2022-04-06 21:04:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:49,827 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-04-06 21:04:49,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-04-06 21:04:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:04:49,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:49,827 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:49,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 21:04:50,028 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,SelfDestructingSolverStorable59 [2022-04-06 21:04:50,028 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1558436086, now seen corresponding path program 59 times [2022-04-06 21:04:50,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:50,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858450368] [2022-04-06 21:04:50,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:50,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1558436086, now seen corresponding path program 60 times [2022-04-06 21:04:50,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:50,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586361725] [2022-04-06 21:04:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:50,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:50,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586361725] [2022-04-06 21:04:50,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586361725] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677638671] [2022-04-06 21:04:50,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:50,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:50,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:50,599 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 21:04:50,600 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 21:04:55,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 21:04:55,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:55,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:04:55,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:56,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:59,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677638671] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:59,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:59,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 65 [2022-04-06 21:04:59,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:59,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858450368] [2022-04-06 21:04:59,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858450368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:59,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:59,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 21:04:59,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253038946] [2022-04-06 21:04:59,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:59,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 21:04:59,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 21:04:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 21:04:59,555 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:00,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:00,096 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-04-06 21:05:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:05:00,096 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:05:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:00,096 INFO L225 Difference]: With dead ends: 49 [2022-04-06 21:05:00,096 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 21:05:00,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 23 SyntacticMatches, 31 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4033, Invalid=5087, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 21:05:00,097 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:00,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:05:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 21:05:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 21:05:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-04-06 21:05:00,104 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2022-04-06 21:05:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:00,104 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-04-06 21:05:00,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-04-06 21:05:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:05:00,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:00,104 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:00,113 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 21:05:00,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:00,311 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:00,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1558484905, now seen corresponding path program 61 times [2022-04-06 21:05:00,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:00,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [59093285] [2022-04-06 21:05:00,312 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:00,312 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:00,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1558484905, now seen corresponding path program 62 times [2022-04-06 21:05:00,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:00,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454649623] [2022-04-06 21:05:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:00,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:00,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:00,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:00,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454649623] [2022-04-06 21:05:00,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454649623] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:00,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574506065] [2022-04-06 21:05:00,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:05:00,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:00,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:00,826 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 21:05:00,826 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 21:05:00,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:05:00,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:00,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 21:05:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:04,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574506065] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:04,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:04,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 21:05:04,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:04,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [59093285] [2022-04-06 21:05:04,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [59093285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:04,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:04,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:05:04,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611960040] [2022-04-06 21:05:04,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:04,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:05:04,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:04,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:05:04,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2058, Invalid=2498, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 21:05:04,871 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:05,766 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-04-06 21:05:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 21:05:05,766 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:05:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:05,767 INFO L225 Difference]: With dead ends: 52 [2022-04-06 21:05:05,767 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 21:05:05,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 21 SyntacticMatches, 30 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4202, Invalid=5698, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 21:05:05,768 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:05,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:05:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 21:05:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-04-06 21:05:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-04-06 21:05:05,772 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2022-04-06 21:05:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:05,773 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-04-06 21:05:05,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-04-06 21:05:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 21:05:05,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:05,773 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:05,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 21:05:05,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:05,974 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:05,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1068394870, now seen corresponding path program 61 times [2022-04-06 21:05:05,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:05,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960232801] [2022-04-06 21:05:05,975 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:05,975 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1068394870, now seen corresponding path program 62 times [2022-04-06 21:05:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:05,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668474090] [2022-04-06 21:05:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:05,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:06,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:06,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:06,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668474090] [2022-04-06 21:05:06,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668474090] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:06,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187830022] [2022-04-06 21:05:06,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:05:06,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:06,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:06,541 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 21:05:06,541 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 21:05:08,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:05:08,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:08,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 21:05:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:08,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187830022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:12,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:12,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 67 [2022-04-06 21:05:12,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960232801] [2022-04-06 21:05:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960232801] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:12,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:12,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:05:12,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961870088] [2022-04-06 21:05:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:12,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:05:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:05:12,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 21:05:12,518 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:13,099 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-04-06 21:05:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 21:05:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 21:05:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:13,100 INFO L225 Difference]: With dead ends: 50 [2022-04-06 21:05:13,100 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 21:05:13,101 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 23 SyntacticMatches, 32 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4291, Invalid=5411, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 21:05:13,101 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:13,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:05:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 21:05:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 21:05:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-04-06 21:05:13,105 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 42 [2022-04-06 21:05:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:13,105 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-04-06 21:05:13,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-04-06 21:05:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 21:05:13,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:13,106 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:13,110 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 21:05:13,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:13,307 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1068443689, now seen corresponding path program 63 times [2022-04-06 21:05:13,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:13,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1112180963] [2022-04-06 21:05:13,308 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:13,308 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:13,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1068443689, now seen corresponding path program 64 times [2022-04-06 21:05:13,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:13,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192533841] [2022-04-06 21:05:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:13,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:13,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:13,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192533841] [2022-04-06 21:05:13,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192533841] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:13,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33657908] [2022-04-06 21:05:13,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:05:13,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:13,863 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 21:05:13,863 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 21:05:13,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:05:13,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:05:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:14,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:18,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33657908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:18,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:18,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 21:05:18,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:18,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1112180963] [2022-04-06 21:05:18,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1112180963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:18,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:18,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 21:05:18,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783337290] [2022-04-06 21:05:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:18,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 21:05:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:18,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 21:05:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2188, Invalid=2642, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 21:05:18,045 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:19,013 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-04-06 21:05:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:05:19,013 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 21:05:19,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:19,014 INFO L225 Difference]: With dead ends: 53 [2022-04-06 21:05:19,014 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 21:05:19,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 21 SyntacticMatches, 31 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4465, Invalid=6041, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:05:19,016 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:19,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:05:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 21:05:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-04-06 21:05:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-04-06 21:05:19,023 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2022-04-06 21:05:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:19,023 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-04-06 21:05:19,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-04-06 21:05:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 21:05:19,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:19,023 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:19,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:19,224 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,SelfDestructingSolverStorable63 [2022-04-06 21:05:19,224 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:19,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:19,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1237980938, now seen corresponding path program 63 times [2022-04-06 21:05:19,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:19,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1548962526] [2022-04-06 21:05:19,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:19,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:19,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1237980938, now seen corresponding path program 64 times [2022-04-06 21:05:19,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:19,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705544371] [2022-04-06 21:05:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:19,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:19,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:19,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:19,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705544371] [2022-04-06 21:05:19,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705544371] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:19,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209786275] [2022-04-06 21:05:19,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:05:19,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:19,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:19,811 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 21:05:19,811 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 21:05:20,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:05:20,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:05:20,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:20,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:24,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209786275] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:24,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:24,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 69 [2022-04-06 21:05:24,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1548962526] [2022-04-06 21:05:24,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1548962526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:24,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:24,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 21:05:24,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348045280] [2022-04-06 21:05:24,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:24,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 21:05:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 21:05:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 21:05:24,655 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:25,253 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-04-06 21:05:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:05:25,253 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:05:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:25,254 INFO L225 Difference]: With dead ends: 51 [2022-04-06 21:05:25,254 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 21:05:25,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 23 SyntacticMatches, 33 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4557, Invalid=5745, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 21:05:25,255 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:25,255 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:05:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 21:05:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 21:05:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-04-06 21:05:25,261 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2022-04-06 21:05:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:25,261 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-04-06 21:05:25,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-04-06 21:05:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 21:05:25,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:25,261 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:25,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 21:05:25,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:25,463 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:25,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1237932119, now seen corresponding path program 65 times [2022-04-06 21:05:25,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:25,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025987915] [2022-04-06 21:05:25,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:25,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1237932119, now seen corresponding path program 66 times [2022-04-06 21:05:25,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:25,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425927116] [2022-04-06 21:05:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:25,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:26,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:26,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425927116] [2022-04-06 21:05:26,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425927116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884074408] [2022-04-06 21:05:26,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:05:26,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:26,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:26,089 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 21:05:26,090 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 21:05:39,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-06 21:05:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:39,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 21:05:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:40,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:44,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884074408] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:44,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:44,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 21:05:44,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:44,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025987915] [2022-04-06 21:05:44,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025987915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:44,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:44,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:05:44,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199945339] [2022-04-06 21:05:44,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:44,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:05:44,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:05:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2322, Invalid=2790, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 21:05:44,001 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:44,982 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-04-06 21:05:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 21:05:44,982 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:05:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:44,983 INFO L225 Difference]: With dead ends: 54 [2022-04-06 21:05:44,983 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 21:05:44,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 21 SyntacticMatches, 32 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4736, Invalid=6394, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 21:05:44,984 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:44,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:05:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 21:05:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-04-06 21:05:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-04-06 21:05:44,988 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2022-04-06 21:05:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:44,989 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-04-06 21:05:44,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-04-06 21:05:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 21:05:44,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:44,989 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:44,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 21:05:45,189 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,SelfDestructingSolverStorable65 [2022-04-06 21:05:45,190 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash 278813046, now seen corresponding path program 65 times [2022-04-06 21:05:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:45,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [967707938] [2022-04-06 21:05:45,191 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:45,191 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:45,191 INFO L85 PathProgramCache]: Analyzing trace with hash 278813046, now seen corresponding path program 66 times [2022-04-06 21:05:45,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:45,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930341169] [2022-04-06 21:05:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:45,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:45,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:05:45,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:45,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930341169] [2022-04-06 21:05:45,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930341169] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:45,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513771473] [2022-04-06 21:05:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:05:45,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:45,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:45,781 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 21:05:45,783 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 21:06:05,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-06 21:06:05,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:05,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 21:06:05,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:05,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:09,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513771473] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:09,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:09,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 71 [2022-04-06 21:06:09,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:09,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [967707938] [2022-04-06 21:06:09,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [967707938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:09,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:09,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:06:09,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533899998] [2022-04-06 21:06:09,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:09,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:06:09,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:09,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:06:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 21:06:09,847 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:10,485 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-04-06 21:06:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 21:06:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 21:06:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:10,486 INFO L225 Difference]: With dead ends: 52 [2022-04-06 21:06:10,486 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 21:06:10,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 23 SyntacticMatches, 34 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4831, Invalid=6089, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 21:06:10,487 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:10,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:06:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 21:06:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 21:06:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-04-06 21:06:10,494 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2022-04-06 21:06:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:10,494 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-04-06 21:06:10,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-04-06 21:06:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 21:06:10,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:10,495 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:10,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:10,695 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,SelfDestructingSolverStorable66 [2022-04-06 21:06:10,696 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash 278861865, now seen corresponding path program 67 times [2022-04-06 21:06:10,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:10,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1077532467] [2022-04-06 21:06:10,697 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:10,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:10,697 INFO L85 PathProgramCache]: Analyzing trace with hash 278861865, now seen corresponding path program 68 times [2022-04-06 21:06:10,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:10,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881050451] [2022-04-06 21:06:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:10,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:11,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:11,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:11,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881050451] [2022-04-06 21:06:11,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881050451] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:11,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507075442] [2022-04-06 21:06:11,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:11,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:11,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:11,339 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 21:06:11,339 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 21:06:11,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:11,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:06:11,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:12,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:16,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507075442] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:16,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:16,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 21:06:16,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:16,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1077532467] [2022-04-06 21:06:16,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1077532467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:16,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:16,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 21:06:16,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173692913] [2022-04-06 21:06:16,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:16,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 21:06:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:16,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 21:06:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2460, Invalid=2942, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 21:06:16,218 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:17,245 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-04-06 21:06:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:06:17,245 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 21:06:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:17,246 INFO L225 Difference]: With dead ends: 55 [2022-04-06 21:06:17,246 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 21:06:17,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 21 SyntacticMatches, 33 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5015, Invalid=6757, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 21:06:17,247 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:17,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:06:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 21:06:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-04-06 21:06:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-04-06 21:06:17,253 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2022-04-06 21:06:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:17,253 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-04-06 21:06:17,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-04-06 21:06:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 21:06:17,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:17,254 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:17,258 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 21:06:17,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 21:06:17,458 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:17,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:17,458 INFO L85 PathProgramCache]: Analyzing trace with hash 54786294, now seen corresponding path program 67 times [2022-04-06 21:06:17,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:17,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567816783] [2022-04-06 21:06:17,459 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:17,459 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:17,459 INFO L85 PathProgramCache]: Analyzing trace with hash 54786294, now seen corresponding path program 68 times [2022-04-06 21:06:17,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:17,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057937776] [2022-04-06 21:06:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:18,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:18,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:18,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057937776] [2022-04-06 21:06:18,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057937776] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:18,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976939598] [2022-04-06 21:06:18,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:18,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:18,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:18,168 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 21:06:18,169 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 21:06:18,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:18,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:18,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:06:18,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:19,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:23,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976939598] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:23,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:23,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 73 [2022-04-06 21:06:23,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:23,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567816783] [2022-04-06 21:06:23,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567816783] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:23,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:23,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 21:06:23,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213473842] [2022-04-06 21:06:23,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:23,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 21:06:23,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:23,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 21:06:23,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 21:06:23,376 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:24,058 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-04-06 21:06:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:06:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:06:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:24,059 INFO L225 Difference]: With dead ends: 53 [2022-04-06 21:06:24,059 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 21:06:24,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 23 SyntacticMatches, 35 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5113, Invalid=6443, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 21:06:24,060 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:24,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:06:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 21:06:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-06 21:06:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-04-06 21:06:24,072 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 45 [2022-04-06 21:06:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:24,072 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-04-06 21:06:24,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-04-06 21:06:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 21:06:24,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:24,073 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:24,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-06 21:06:24,273 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,SelfDestructingSolverStorable68 [2022-04-06 21:06:24,273 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:24,274 INFO L85 PathProgramCache]: Analyzing trace with hash 54835113, now seen corresponding path program 69 times [2022-04-06 21:06:24,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:24,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670126310] [2022-04-06 21:06:24,275 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:24,275 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:24,275 INFO L85 PathProgramCache]: Analyzing trace with hash 54835113, now seen corresponding path program 70 times [2022-04-06 21:06:24,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:24,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391345841] [2022-04-06 21:06:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:24,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:24,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:24,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:24,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391345841] [2022-04-06 21:06:24,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391345841] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:24,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571199118] [2022-04-06 21:06:24,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:24,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:24,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:24,887 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 21:06:24,888 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 21:06:25,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:25,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:25,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 21:06:25,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:25,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:29,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571199118] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:29,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:29,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 21:06:29,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:29,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670126310] [2022-04-06 21:06:29,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670126310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:29,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:29,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:06:29,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991436134] [2022-04-06 21:06:29,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:29,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:06:29,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:06:29,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=3098, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 21:06:29,885 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:30,950 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-04-06 21:06:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 21:06:30,950 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:06:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:30,951 INFO L225 Difference]: With dead ends: 56 [2022-04-06 21:06:30,951 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 21:06:30,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 21 SyntacticMatches, 34 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5302, Invalid=7130, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 21:06:30,952 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:30,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:06:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 21:06:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-04-06 21:06:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-04-06 21:06:30,957 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2022-04-06 21:06:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:30,957 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-04-06 21:06:30,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-04-06 21:06:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 21:06:30,957 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:30,957 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:30,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:31,158 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:31,158 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:31,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1699891574, now seen corresponding path program 69 times [2022-04-06 21:06:31,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:31,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [954794171] [2022-04-06 21:06:31,159 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:31,159 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1699891574, now seen corresponding path program 70 times [2022-04-06 21:06:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:31,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755948344] [2022-04-06 21:06:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:31,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:31,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755948344] [2022-04-06 21:06:31,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755948344] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508661942] [2022-04-06 21:06:31,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:31,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:31,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:31,815 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 21:06:31,816 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 21:06:32,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:32,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 21:06:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:32,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:37,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508661942] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:37,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:37,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 75 [2022-04-06 21:06:37,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [954794171] [2022-04-06 21:06:37,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [954794171] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:37,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:37,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:06:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991502246] [2022-04-06 21:06:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:37,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:06:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:06:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 21:06:37,208 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:37,868 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-04-06 21:06:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 21:06:37,868 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 21:06:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:37,869 INFO L225 Difference]: With dead ends: 54 [2022-04-06 21:06:37,869 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 21:06:37,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 23 SyntacticMatches, 36 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5403, Invalid=6807, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 21:06:37,870 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:37,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:06:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 21:06:37,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 21:06:37,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-04-06 21:06:37,877 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2022-04-06 21:06:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:37,877 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-04-06 21:06:37,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-04-06 21:06:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 21:06:37,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:37,877 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:37,903 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 21:06:38,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:38,078 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1699940393, now seen corresponding path program 71 times [2022-04-06 21:06:38,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:38,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1426755317] [2022-04-06 21:06:38,079 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:38,079 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1699940393, now seen corresponding path program 72 times [2022-04-06 21:06:38,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:38,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164204953] [2022-04-06 21:06:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:38,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:38,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:38,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164204953] [2022-04-06 21:06:38,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164204953] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673628366] [2022-04-06 21:06:38,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:38,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:38,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:38,712 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 21:06:38,713 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 21:06:49,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 21:06:49,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:49,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:06:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:50,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:54,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673628366] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:54,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:54,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 21:06:54,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1426755317] [2022-04-06 21:06:54,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1426755317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:54,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:54,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 21:06:54,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573922433] [2022-04-06 21:06:54,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:54,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 21:06:54,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 21:06:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2748, Invalid=3258, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 21:06:54,993 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:56,106 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-04-06 21:06:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:06:56,107 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 21:06:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:56,107 INFO L225 Difference]: With dead ends: 57 [2022-04-06 21:06:56,107 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 21:06:56,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 21 SyntacticMatches, 35 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5597, Invalid=7513, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 21:06:56,108 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:56,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:06:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 21:06:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-04-06 21:06:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-04-06 21:06:56,114 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2022-04-06 21:06:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:56,115 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-04-06 21:06:56,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-04-06 21:06:56,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 21:06:56,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:56,115 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:56,120 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 21:06:56,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:56,316 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1158547702, now seen corresponding path program 71 times [2022-04-06 21:06:56,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:56,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [848743576] [2022-04-06 21:06:56,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:56,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1158547702, now seen corresponding path program 72 times [2022-04-06 21:06:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:56,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497843292] [2022-04-06 21:06:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:56,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:56,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497843292] [2022-04-06 21:06:56,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497843292] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29173885] [2022-04-06 21:06:56,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:56,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:56,983 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 21:06:56,984 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 21:07:17,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 21:07:17,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:07:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:18,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:22,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29173885] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:22,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:22,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 77 [2022-04-06 21:07:22,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:22,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [848743576] [2022-04-06 21:07:22,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [848743576] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:22,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:22,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 21:07:22,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139821750] [2022-04-06 21:07:22,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:22,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 21:07:22,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:22,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 21:07:22,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 21:07:22,984 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:23,724 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-04-06 21:07:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:07:23,725 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:07:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:23,725 INFO L225 Difference]: With dead ends: 55 [2022-04-06 21:07:23,725 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 21:07:23,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 23 SyntacticMatches, 37 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5701, Invalid=7181, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 21:07:23,726 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:23,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 21:07:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 21:07:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-04-06 21:07:23,732 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2022-04-06 21:07:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:23,733 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-04-06 21:07:23,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-04-06 21:07:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 21:07:23,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:23,733 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:23,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 21:07:23,933 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,SelfDestructingSolverStorable72 [2022-04-06 21:07:23,934 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1158596521, now seen corresponding path program 73 times [2022-04-06 21:07:23,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:23,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [49553812] [2022-04-06 21:07:23,935 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:23,935 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1158596521, now seen corresponding path program 74 times [2022-04-06 21:07:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132409840] [2022-04-06 21:07:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:24,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:24,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:24,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132409840] [2022-04-06 21:07:24,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132409840] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:24,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445664670] [2022-04-06 21:07:24,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:24,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:24,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:24,589 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 21:07:24,590 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 21:07:24,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:24,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 21:07:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:30,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445664670] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:30,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:30,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 21:07:30,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:30,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [49553812] [2022-04-06 21:07:30,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [49553812] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:30,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:30,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:07:30,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847868304] [2022-04-06 21:07:30,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:30,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:07:30,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:07:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2898, Invalid=3422, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 21:07:30,055 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:31,229 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-04-06 21:07:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 21:07:31,230 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:07:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:31,230 INFO L225 Difference]: With dead ends: 58 [2022-04-06 21:07:31,230 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 21:07:31,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 21 SyntacticMatches, 36 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5900, Invalid=7906, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 21:07:31,231 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:31,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 21:07:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-04-06 21:07:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-04-06 21:07:31,237 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2022-04-06 21:07:31,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:31,237 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-04-06 21:07:31,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-04-06 21:07:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 21:07:31,237 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:31,237 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:31,243 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 21:07:31,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:31,438 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:31,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:31,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1556756854, now seen corresponding path program 73 times [2022-04-06 21:07:31,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:31,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [620577934] [2022-04-06 21:07:31,439 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:31,439 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:31,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1556756854, now seen corresponding path program 74 times [2022-04-06 21:07:31,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:31,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547393632] [2022-04-06 21:07:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:31,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:32,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:32,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:32,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547393632] [2022-04-06 21:07:32,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547393632] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:32,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143779783] [2022-04-06 21:07:32,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:32,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:32,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:32,182 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 21:07:32,183 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 21:07:32,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:32,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:32,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 21:07:32,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:33,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:37,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143779783] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:37,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:37,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 79 [2022-04-06 21:07:37,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:37,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [620577934] [2022-04-06 21:07:37,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [620577934] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:37,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:37,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:07:37,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84012217] [2022-04-06 21:07:37,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:37,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:07:37,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:37,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:07:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 21:07:37,967 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:38,722 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-04-06 21:07:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 21:07:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 21:07:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:38,723 INFO L225 Difference]: With dead ends: 56 [2022-04-06 21:07:38,723 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 21:07:38,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 23 SyntacticMatches, 38 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6007, Invalid=7565, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 21:07:38,732 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:38,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 21:07:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 21:07:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-04-06 21:07:38,737 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 48 [2022-04-06 21:07:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:38,737 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-04-06 21:07:38,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-04-06 21:07:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 21:07:38,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:38,737 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:38,741 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 21:07:38,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:38,938 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:38,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1556805673, now seen corresponding path program 75 times [2022-04-06 21:07:38,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:38,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1371985090] [2022-04-06 21:07:38,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:38,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:38,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1556805673, now seen corresponding path program 76 times [2022-04-06 21:07:38,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:38,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694980478] [2022-04-06 21:07:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:38,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:39,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:39,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694980478] [2022-04-06 21:07:39,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694980478] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:39,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521144681] [2022-04-06 21:07:39,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:39,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:39,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:39,653 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 21:07:39,653 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 21:07:39,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:39,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:39,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:07:39,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:40,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:45,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521144681] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:45,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:45,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 21:07:45,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:45,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1371985090] [2022-04-06 21:07:45,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1371985090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:45,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:45,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 21:07:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028124915] [2022-04-06 21:07:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:45,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 21:07:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 21:07:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3052, Invalid=3590, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 21:07:45,482 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:46,694 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-04-06 21:07:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:07:46,695 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 21:07:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:46,695 INFO L225 Difference]: With dead ends: 59 [2022-04-06 21:07:46,695 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 21:07:46,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 21 SyntacticMatches, 37 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6211, Invalid=8309, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 21:07:46,696 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:46,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:46,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 21:07:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-04-06 21:07:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-04-06 21:07:46,701 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2022-04-06 21:07:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:46,701 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-04-06 21:07:46,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-04-06 21:07:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:07:46,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:46,702 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:46,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:46,902 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,SelfDestructingSolverStorable75 [2022-04-06 21:07:46,902 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:46,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1016338678, now seen corresponding path program 75 times [2022-04-06 21:07:46,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:46,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [438785046] [2022-04-06 21:07:46,904 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:46,904 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:46,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1016338678, now seen corresponding path program 76 times [2022-04-06 21:07:46,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:46,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683069308] [2022-04-06 21:07:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:46,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:47,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:47,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683069308] [2022-04-06 21:07:47,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683069308] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097266298] [2022-04-06 21:07:47,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:47,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:47,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:47,628 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 21:07:47,628 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 21:07:47,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:47,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:47,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:07:47,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:48,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:54,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097266298] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:54,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:54,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 81 [2022-04-06 21:07:54,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:54,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [438785046] [2022-04-06 21:07:54,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [438785046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:54,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:54,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 21:07:54,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242261281] [2022-04-06 21:07:54,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:54,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 21:07:54,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:54,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 21:07:54,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 21:07:54,305 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:55,061 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-04-06 21:07:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:07:55,062 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:07:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:55,062 INFO L225 Difference]: With dead ends: 57 [2022-04-06 21:07:55,062 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 21:07:55,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 23 SyntacticMatches, 39 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6321, Invalid=7959, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 21:07:55,063 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:55,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 21:07:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-06 21:07:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-04-06 21:07:55,071 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2022-04-06 21:07:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:55,071 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-04-06 21:07:55,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-04-06 21:07:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:07:55,072 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:55,072 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:55,091 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 21:07:55,283 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,SelfDestructingSolverStorable76 [2022-04-06 21:07:55,283 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:55,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:55,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1016387497, now seen corresponding path program 77 times [2022-04-06 21:07:55,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:55,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731522724] [2022-04-06 21:07:55,284 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:55,285 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:55,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1016387497, now seen corresponding path program 78 times [2022-04-06 21:07:55,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:55,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880659732] [2022-04-06 21:07:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:55,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:56,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:07:56,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:56,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880659732] [2022-04-06 21:07:56,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880659732] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:56,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246600750] [2022-04-06 21:07:56,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:56,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:56,005 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 21:07:56,006 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 21:09:18,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-04-06 21:09:18,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:18,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 21:09:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:19,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:24,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246600750] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:24,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:24,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 21:09:24,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:24,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731522724] [2022-04-06 21:09:24,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731522724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:24,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:24,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:09:24,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21443418] [2022-04-06 21:09:24,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:24,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:09:24,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:24,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:09:24,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3210, Invalid=3762, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:09:24,213 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:25,472 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-04-06 21:09:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 21:09:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:09:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:25,472 INFO L225 Difference]: With dead ends: 60 [2022-04-06 21:09:25,473 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 21:09:25,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 21 SyntacticMatches, 38 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=6530, Invalid=8722, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 21:09:25,474 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:25,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 21:09:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-04-06 21:09:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-04-06 21:09:25,479 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2022-04-06 21:09:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:25,479 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-04-06 21:09:25,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-04-06 21:09:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:09:25,480 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:25,480 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:25,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 21:09:25,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:25,680 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1443244406, now seen corresponding path program 77 times [2022-04-06 21:09:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233869323] [2022-04-06 21:09:25,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:25,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1443244406, now seen corresponding path program 78 times [2022-04-06 21:09:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:25,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258276528] [2022-04-06 21:09:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:25,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:26,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:26,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258276528] [2022-04-06 21:09:26,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258276528] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:26,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741029639] [2022-04-06 21:09:26,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:09:26,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:26,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:26,444 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 21:09:26,445 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 21:09:48,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-04-06 21:09:48,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:48,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 21:09:48,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:49,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:55,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741029639] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:55,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:55,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 83 [2022-04-06 21:09:55,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:55,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233869323] [2022-04-06 21:09:55,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233869323] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:55,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:55,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:09:55,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129228210] [2022-04-06 21:09:55,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:55,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:09:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:09:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 21:09:55,162 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:55,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:55,970 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-04-06 21:09:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 21:09:55,971 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 21:09:55,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:55,971 INFO L225 Difference]: With dead ends: 58 [2022-04-06 21:09:55,971 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 21:09:55,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 23 SyntacticMatches, 40 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=6643, Invalid=8363, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 21:09:55,973 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:55,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 21:09:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 21:09:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-04-06 21:09:55,977 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 50 [2022-04-06 21:09:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:55,977 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-04-06 21:09:55,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-04-06 21:09:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:09:55,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:55,978 INFO L499 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:55,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:56,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:56,178 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:56,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1443293225, now seen corresponding path program 79 times [2022-04-06 21:09:56,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:56,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863450469] [2022-04-06 21:09:56,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:56,180 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1443293225, now seen corresponding path program 80 times [2022-04-06 21:09:56,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:56,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855661424] [2022-04-06 21:09:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:56,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:56,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855661424] [2022-04-06 21:09:56,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855661424] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98594728] [2022-04-06 21:09:56,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:09:56,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:56,983 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 21:09:56,984 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 21:09:57,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:09:57,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:57,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 21:09:57,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:58,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:03,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98594728] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:03,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:03,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 21:10:03,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:03,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863450469] [2022-04-06 21:10:03,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863450469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:03,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:03,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 21:10:03,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449869072] [2022-04-06 21:10:03,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:03,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 21:10:03,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:03,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 21:10:03,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3372, Invalid=3938, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 21:10:03,565 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:04,871 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-04-06 21:10:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:10:04,872 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 21:10:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:04,872 INFO L225 Difference]: With dead ends: 61 [2022-04-06 21:10:04,872 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 21:10:04,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 21 SyntacticMatches, 39 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6857, Invalid=9145, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 21:10:04,873 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:04,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 21:10:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-04-06 21:10:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-04-06 21:10:04,878 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2022-04-06 21:10:04,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:04,878 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-04-06 21:10:04,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-04-06 21:10:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:10:04,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:04,879 INFO L499 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:04,883 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 21:10:05,079 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,SelfDestructingSolverStorable79 [2022-04-06 21:10:05,079 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:05,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1792420086, now seen corresponding path program 79 times [2022-04-06 21:10:05,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:05,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355806205] [2022-04-06 21:10:05,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:05,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:05,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1792420086, now seen corresponding path program 80 times [2022-04-06 21:10:05,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:05,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79071041] [2022-04-06 21:10:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:05,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:05,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:05,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:05,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79071041] [2022-04-06 21:10:05,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79071041] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:05,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899403771] [2022-04-06 21:10:05,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:10:05,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:05,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:05,908 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 21:10:05,909 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 21:10:06,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:10:06,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 21:10:06,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:07,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:12,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899403771] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:12,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:12,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 85 [2022-04-06 21:10:12,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:12,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355806205] [2022-04-06 21:10:12,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355806205] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:12,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:12,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 21:10:12,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131992631] [2022-04-06 21:10:12,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:12,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 21:10:12,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:12,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 21:10:12,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 21:10:12,611 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:13,423 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-04-06 21:10:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:10:13,424 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:10:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:13,424 INFO L225 Difference]: With dead ends: 59 [2022-04-06 21:10:13,424 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 21:10:13,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 23 SyntacticMatches, 41 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6973, Invalid=8777, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 21:10:13,426 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:13,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 21:10:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 21:10:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-04-06 21:10:13,430 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 51 [2022-04-06 21:10:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:13,430 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-04-06 21:10:13,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-04-06 21:10:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:10:13,431 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:13,431 INFO L499 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:13,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 21:10:13,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:13,631 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1792468905, now seen corresponding path program 81 times [2022-04-06 21:10:13,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:13,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629150633] [2022-04-06 21:10:13,633 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:13,633 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1792468905, now seen corresponding path program 82 times [2022-04-06 21:10:13,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:13,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421606174] [2022-04-06 21:10:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:13,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:14,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:14,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421606174] [2022-04-06 21:10:14,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421606174] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974010131] [2022-04-06 21:10:14,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:10:14,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:14,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:14,427 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 21:10:14,428 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 21:10:14,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:10:14,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:14,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 21:10:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:15,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:21,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974010131] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:21,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:21,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 21:10:21,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:21,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629150633] [2022-04-06 21:10:21,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629150633] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:21,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:21,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:10:21,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954095952] [2022-04-06 21:10:21,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:21,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:10:21,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:10:21,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3538, Invalid=4118, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 21:10:21,249 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:22,649 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-04-06 21:10:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 21:10:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:10:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:22,650 INFO L225 Difference]: With dead ends: 62 [2022-04-06 21:10:22,650 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 21:10:22,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 21 SyntacticMatches, 40 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=7192, Invalid=9578, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 21:10:22,651 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:22,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 21:10:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-04-06 21:10:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-04-06 21:10:22,656 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2022-04-06 21:10:22,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:22,656 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-04-06 21:10:22,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-04-06 21:10:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:10:22,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:22,657 INFO L499 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:22,662 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 21:10:22,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:22,858 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash -268035722, now seen corresponding path program 81 times [2022-04-06 21:10:22,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:22,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1158438554] [2022-04-06 21:10:22,860 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:22,860 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:22,860 INFO L85 PathProgramCache]: Analyzing trace with hash -268035722, now seen corresponding path program 82 times [2022-04-06 21:10:22,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:22,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582878625] [2022-04-06 21:10:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:22,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:23,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:23,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582878625] [2022-04-06 21:10:23,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582878625] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207375816] [2022-04-06 21:10:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:10:23,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:23,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:23,697 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 21:10:23,698 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 21:10:23,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:10:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:23,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 21:10:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:25,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:30,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207375816] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:30,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:30,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 87 [2022-04-06 21:10:30,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:30,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1158438554] [2022-04-06 21:10:30,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1158438554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:30,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:30,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:10:30,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313657698] [2022-04-06 21:10:30,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:30,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:10:30,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:30,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:10:30,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 21:10:30,972 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:31,835 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-04-06 21:10:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 21:10:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 21:10:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:31,836 INFO L225 Difference]: With dead ends: 60 [2022-04-06 21:10:31,836 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 21:10:31,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 23 SyntacticMatches, 42 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=7311, Invalid=9201, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 21:10:31,837 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:31,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 21:10:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 21:10:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-04-06 21:10:31,842 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2022-04-06 21:10:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:31,842 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-04-06 21:10:31,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-04-06 21:10:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:10:31,842 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:31,842 INFO L499 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:31,847 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 21:10:32,043 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,SelfDestructingSolverStorable82 [2022-04-06 21:10:32,043 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash -267986903, now seen corresponding path program 83 times [2022-04-06 21:10:32,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:32,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665152802] [2022-04-06 21:10:32,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:32,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash -267986903, now seen corresponding path program 84 times [2022-04-06 21:10:32,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:32,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414184212] [2022-04-06 21:10:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:32,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:32,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:32,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:32,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414184212] [2022-04-06 21:10:32,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414184212] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:32,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016720071] [2022-04-06 21:10:32,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:10:32,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:32,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:32,897 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 21:10:32,898 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 21:10:51,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 21:10:51,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:51,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 21:10:51,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:53,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:58,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016720071] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:58,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:58,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 21:10:58,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:58,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665152802] [2022-04-06 21:10:58,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665152802] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:58,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:58,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 21:10:58,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578971491] [2022-04-06 21:10:58,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:58,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 21:10:58,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 21:10:58,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3708, Invalid=4302, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:10:58,707 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:00,133 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-04-06 21:11:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:11:00,133 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 21:11:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:00,134 INFO L225 Difference]: With dead ends: 63 [2022-04-06 21:11:00,134 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 21:11:00,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 21 SyntacticMatches, 41 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=7535, Invalid=10021, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 21:11:00,136 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:00,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 21:11:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-04-06 21:11:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-04-06 21:11:00,141 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2022-04-06 21:11:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:00,141 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-04-06 21:11:00,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-04-06 21:11:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:11:00,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:00,142 INFO L499 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:00,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 21:11:00,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:00,347 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:00,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash 282343670, now seen corresponding path program 83 times [2022-04-06 21:11:00,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:00,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120536422] [2022-04-06 21:11:00,349 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:00,349 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:00,349 INFO L85 PathProgramCache]: Analyzing trace with hash 282343670, now seen corresponding path program 84 times [2022-04-06 21:11:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:00,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276272679] [2022-04-06 21:11:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:00,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:01,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:01,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276272679] [2022-04-06 21:11:01,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276272679] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110169116] [2022-04-06 21:11:01,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:11:01,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:01,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:01,207 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 21:11:01,208 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 21:13:01,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 21:13:01,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 21:13:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:02,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:08,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110169116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:08,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:08,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 89 [2022-04-06 21:13:08,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:08,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120536422] [2022-04-06 21:13:08,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120536422] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:08,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:08,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 21:13:08,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590810208] [2022-04-06 21:13:08,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:08,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 21:13:08,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:08,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 21:13:08,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 21:13:08,640 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:09,508 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-04-06 21:13:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:13:09,508 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:13:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:09,509 INFO L225 Difference]: With dead ends: 61 [2022-04-06 21:13:09,509 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 21:13:09,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 23 SyntacticMatches, 43 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=7657, Invalid=9635, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 21:13:09,510 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:09,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 21:13:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-06 21:13:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-04-06 21:13:09,516 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 53 [2022-04-06 21:13:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:09,517 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-04-06 21:13:09,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-04-06 21:13:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:13:09,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:09,517 INFO L499 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:09,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:09,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:09,730 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:09,730 INFO L85 PathProgramCache]: Analyzing trace with hash 282392489, now seen corresponding path program 85 times [2022-04-06 21:13:09,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:09,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871775567] [2022-04-06 21:13:09,731 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:09,731 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 282392489, now seen corresponding path program 86 times [2022-04-06 21:13:09,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:09,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615101707] [2022-04-06 21:13:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:09,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:10,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:10,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615101707] [2022-04-06 21:13:10,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615101707] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377729747] [2022-04-06 21:13:10,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:10,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:10,624 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 21:13:10,625 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 21:13:10,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:10,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:10,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 21:13:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:12,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:17,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377729747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:17,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:17,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 21:13:17,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:17,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871775567] [2022-04-06 21:13:17,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871775567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:17,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:17,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 21:13:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670085427] [2022-04-06 21:13:17,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:17,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 21:13:17,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 21:13:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3882, Invalid=4490, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 21:13:17,870 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:19,344 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-04-06 21:13:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 21:13:19,344 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:13:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:19,344 INFO L225 Difference]: With dead ends: 64 [2022-04-06 21:13:19,345 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 21:13:19,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 21 SyntacticMatches, 42 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=7886, Invalid=10474, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 21:13:19,347 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:19,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 21:13:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-04-06 21:13:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-04-06 21:13:19,353 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2022-04-06 21:13:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:19,353 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-04-06 21:13:19,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-04-06 21:13:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 21:13:19,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:19,354 INFO L499 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:19,370 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 21:13:19,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:19,554 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 164235638, now seen corresponding path program 85 times [2022-04-06 21:13:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:19,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1064293345] [2022-04-06 21:13:19,556 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:19,556 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash 164235638, now seen corresponding path program 86 times [2022-04-06 21:13:19,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:19,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120128581] [2022-04-06 21:13:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:19,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120128581] [2022-04-06 21:13:20,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120128581] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678165752] [2022-04-06 21:13:20,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:20,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:20,446 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 21:13:20,446 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 21:13:20,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:20,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:20,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 21:13:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:21,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:28,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678165752] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:28,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:28,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 91 [2022-04-06 21:13:28,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:28,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1064293345] [2022-04-06 21:13:28,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1064293345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:28,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:28,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 21:13:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125093664] [2022-04-06 21:13:28,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:28,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 21:13:28,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 21:13:28,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 21:13:28,549 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:29,505 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-04-06 21:13:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 21:13:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 21:13:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:29,506 INFO L225 Difference]: With dead ends: 62 [2022-04-06 21:13:29,506 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 21:13:29,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 23 SyntacticMatches, 44 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8011, Invalid=10079, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 21:13:29,508 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:29,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 21:13:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 21:13:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-04-06 21:13:29,515 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 54 [2022-04-06 21:13:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:29,516 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-04-06 21:13:29,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-04-06 21:13:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 21:13:29,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:29,516 INFO L499 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:29,525 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 21:13:29,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:29,726 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash 164284457, now seen corresponding path program 87 times [2022-04-06 21:13:29,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:29,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [87987990] [2022-04-06 21:13:29,727 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:29,727 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:29,727 INFO L85 PathProgramCache]: Analyzing trace with hash 164284457, now seen corresponding path program 88 times [2022-04-06 21:13:29,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:29,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808936923] [2022-04-06 21:13:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:29,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:30,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:30,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808936923] [2022-04-06 21:13:30,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808936923] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399935716] [2022-04-06 21:13:30,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:13:30,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:30,611 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 21:13:30,612 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 21:13:30,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:13:30,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:30,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 21:13:30,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:32,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:38,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399935716] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:38,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:38,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-06 21:13:38,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:38,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [87987990] [2022-04-06 21:13:38,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [87987990] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:38,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:38,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 21:13:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823322952] [2022-04-06 21:13:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:38,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 21:13:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 21:13:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4060, Invalid=4682, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 21:13:38,174 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:39,668 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-04-06 21:13:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:13:39,669 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 21:13:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:39,669 INFO L225 Difference]: With dead ends: 65 [2022-04-06 21:13:39,669 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 21:13:39,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 21 SyntacticMatches, 43 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8245, Invalid=10937, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 21:13:39,671 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:39,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:39,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 21:13:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-04-06 21:13:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-04-06 21:13:39,676 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2022-04-06 21:13:39,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:39,676 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-04-06 21:13:39,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:39,676 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-04-06 21:13:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:13:39,676 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:39,676 INFO L499 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:39,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:39,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:39,877 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash 797853942, now seen corresponding path program 87 times [2022-04-06 21:13:39,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:39,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [763593481] [2022-04-06 21:13:39,878 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:39,878 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:39,878 INFO L85 PathProgramCache]: Analyzing trace with hash 797853942, now seen corresponding path program 88 times [2022-04-06 21:13:39,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:39,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530691011] [2022-04-06 21:13:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:39,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:40,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:40,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:40,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530691011] [2022-04-06 21:13:40,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530691011] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:40,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937038623] [2022-04-06 21:13:40,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:13:40,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:40,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:40,802 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 21:13:40,802 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 21:13:40,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:13:40,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:40,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 21:13:40,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:42,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:48,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937038623] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:48,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:48,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 93 [2022-04-06 21:13:48,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [763593481] [2022-04-06 21:13:48,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [763593481] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:48,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:48,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 21:13:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378616583] [2022-04-06 21:13:48,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:48,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 21:13:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 21:13:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 21:13:48,802 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:49,736 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-04-06 21:13:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:13:49,736 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:13:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:49,737 INFO L225 Difference]: With dead ends: 63 [2022-04-06 21:13:49,737 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 21:13:49,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 23 SyntacticMatches, 45 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8373, Invalid=10533, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 21:13:49,738 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:49,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 21:13:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-04-06 21:13:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-04-06 21:13:49,746 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2022-04-06 21:13:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:49,746 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-04-06 21:13:49,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-04-06 21:13:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:13:49,746 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:49,746 INFO L499 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:49,751 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 21:13:49,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-04-06 21:13:49,952 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:49,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:49,952 INFO L85 PathProgramCache]: Analyzing trace with hash 797902761, now seen corresponding path program 89 times [2022-04-06 21:13:49,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:49,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [587448983] [2022-04-06 21:13:49,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:49,953 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash 797902761, now seen corresponding path program 90 times [2022-04-06 21:13:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:49,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808825158] [2022-04-06 21:13:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:49,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:50,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:50,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:50,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808825158] [2022-04-06 21:13:50,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808825158] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:50,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509152462] [2022-04-06 21:13:50,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:13:50,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:50,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:50,863 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 21:13:50,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process