/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-zilu/benchmark23_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:06:41,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:06:41,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:06:41,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:06:41,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:06:41,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:06:41,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:06:41,862 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 21:06:41,869 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:06:41,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:06:41,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:06:41,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:06:41,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:06:41,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:06:41,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:06:41,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:06:41,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:06:41,872 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:06:41,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:06:41,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:06:41,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:06:41,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:06:41,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:06:41,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:06:41,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:06:41,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:06:41,873 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:06:41,873 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:06:41,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:06:41,873 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:06:41,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:06:42,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:06:42,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:06:42,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:06:42,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:06:42,126 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:06:42,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.i [2022-04-06 21:06:42,185 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7bd00c4/f784ff4553204b779eea784efeeb47e1/FLAG93646a916 [2022-04-06 21:06:42,569 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:06:42,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.i [2022-04-06 21:06:42,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7bd00c4/f784ff4553204b779eea784efeeb47e1/FLAG93646a916 [2022-04-06 21:06:42,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7bd00c4/f784ff4553204b779eea784efeeb47e1 [2022-04-06 21:06:42,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:06:42,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:06:42,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:06:42,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:06:42,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:06:42,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@227b59f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42, skipping insertion in model container [2022-04-06 21:06:42,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:06:42,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:06:42,814 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-zilu/benchmark23_conjunctive.i[873,886] [2022-04-06 21:06:42,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:06:42,826 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:06:42,836 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-zilu/benchmark23_conjunctive.i[873,886] [2022-04-06 21:06:42,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:06:42,847 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:06:42,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42 WrapperNode [2022-04-06 21:06:42,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:06:42,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:06:42,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:06:42,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:06:42,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:06:42,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:06:42,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:06:42,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:06:42,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42" (1/1) ... [2022-04-06 21:06:42,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:06:42,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:42,912 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 21:06:42,941 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 21:06:42,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:06:42,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:06:42,962 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:06:42,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:06:42,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:06:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:06:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 21:06:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 21:06:42,962 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:06:42,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:06:42,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 21:06:42,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-04-06 21:06:42,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:06:42,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:06:42,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:06:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:06:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:06:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:06:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:06:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:06:43,025 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:06:43,027 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:06:43,166 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:06:43,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:06:43,170 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:06:43,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:06:43 BoogieIcfgContainer [2022-04-06 21:06:43,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:06:43,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:06:43,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:06:43,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:06:43,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:06:42" (1/3) ... [2022-04-06 21:06:43,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfd76c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:06:43, skipping insertion in model container [2022-04-06 21:06:43,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:42" (2/3) ... [2022-04-06 21:06:43,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfd76c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:06:43, skipping insertion in model container [2022-04-06 21:06:43,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:06:43" (3/3) ... [2022-04-06 21:06:43,178 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2022-04-06 21:06:43,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:06:43,182 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:06:43,236 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:06:43,244 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 21:06:43,245 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:06:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:06:43,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 21:06:43,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:43,265 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:43,265 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:43,269 INFO L85 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2022-04-06 21:06:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:43,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173673148] [2022-04-06 21:06:43,291 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:06:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 2 times [2022-04-06 21:06:43,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:43,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955778212] [2022-04-06 21:06:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:43,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:43,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:43,427 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 21:06:43,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:43,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955778212] [2022-04-06 21:06:43,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955778212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:43,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:43,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:06:43,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:43,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173673148] [2022-04-06 21:06:43,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173673148] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:43,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:43,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:06:43,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065793052] [2022-04-06 21:06:43,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:43,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:06:43,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:06:43,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:06:43,467 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:43,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:43,540 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-04-06 21:06:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:06:43,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 21:06:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:43,546 INFO L225 Difference]: With dead ends: 33 [2022-04-06 21:06:43,547 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 21:06:43,549 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 21:06:43,551 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:43,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 21:06:43,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 21:06:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-06 21:06:43,586 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-04-06 21:06:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:43,587 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-06 21:06:43,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-06 21:06:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 21:06:43,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:43,588 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:43,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:06:43,588 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2022-04-06 21:06:43,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:43,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [178815669] [2022-04-06 21:06:43,603 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:43,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 2 times [2022-04-06 21:06:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:43,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120997666] [2022-04-06 21:06:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:43,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:43,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:43,678 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 21:06:43,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:43,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120997666] [2022-04-06 21:06:43,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120997666] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:43,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244803914] [2022-04-06 21:06:43,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:43,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:43,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:43,688 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 21:06:43,690 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 21:06:43,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:43,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:43,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 21:06:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:43,812 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 21:06:43,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:43,891 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 21:06:43,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244803914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:43,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:43,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-04-06 21:06:43,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:43,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [178815669] [2022-04-06 21:06:43,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [178815669] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:43,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:43,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:06:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040465978] [2022-04-06 21:06:43,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:43,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:06:43,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:06:43,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 21:06:43,895 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:43,938 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-04-06 21:06:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:06:43,938 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 21:06:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:43,939 INFO L225 Difference]: With dead ends: 20 [2022-04-06 21:06:43,939 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 21:06:43,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 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 21:06:43,941 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:43,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 21:06:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 21:06:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-06 21:06:43,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-04-06 21:06:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:43,946 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-06 21:06:43,946 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:43,946 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-06 21:06:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 21:06:43,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:43,947 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:43,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:44,179 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 21:06:44,180 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 3 times [2022-04-06 21:06:44,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:44,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858515535] [2022-04-06 21:06:44,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:44,183 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 4 times [2022-04-06 21:06:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:44,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239767188] [2022-04-06 21:06:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:44,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:44,255 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 21:06:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:44,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239767188] [2022-04-06 21:06:44,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239767188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:44,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017447996] [2022-04-06 21:06:44,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:44,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:44,258 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 21:06:44,260 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 21:06:44,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:44,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:44,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:06:44,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:44,338 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 21:06:44,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:44,424 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 21:06:44,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017447996] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:44,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:44,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-04-06 21:06:44,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:44,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858515535] [2022-04-06 21:06:44,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858515535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:44,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:44,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:06:44,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236073211] [2022-04-06 21:06:44,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:44,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:06:44,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:06:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:06:44,427 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:44,483 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-04-06 21:06:44,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:06:44,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 21:06:44,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:44,485 INFO L225 Difference]: With dead ends: 21 [2022-04-06 21:06:44,485 INFO L226 Difference]: Without dead ends: 16 [2022-04-06 21:06:44,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:06:44,491 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 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 21:06:44,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-06 21:06:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-06 21:06:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-04-06 21:06:44,495 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2022-04-06 21:06:44,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:44,496 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-04-06 21:06:44,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-04-06 21:06:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 21:06:44,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:44,497 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:44,518 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 21:06:44,697 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 21:06:44,698 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:44,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash -955485626, now seen corresponding path program 5 times [2022-04-06 21:06:44,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:44,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1513883507] [2022-04-06 21:06:44,700 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:44,700 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash -955485626, now seen corresponding path program 6 times [2022-04-06 21:06:44,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:44,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311433782] [2022-04-06 21:06:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:44,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:44,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:44,769 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 21:06:44,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:44,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311433782] [2022-04-06 21:06:44,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311433782] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:44,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154984013] [2022-04-06 21:06:44,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:44,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:44,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:44,773 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 21:06:44,775 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 21:06:44,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:06:44,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:44,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:06:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:44,850 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 21:06:44,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:44,916 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 21:06:44,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154984013] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:44,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:44,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-04-06 21:06:44,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1513883507] [2022-04-06 21:06:44,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1513883507] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:44,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:44,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:06:44,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912206357] [2022-04-06 21:06:44,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:44,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:06:44,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:06:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:06:44,919 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:44,979 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-04-06 21:06:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:06:44,980 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 21:06:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:44,981 INFO L225 Difference]: With dead ends: 22 [2022-04-06 21:06:44,981 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 21:06:44,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:06:44,985 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:44,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 21:06:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 21:06:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-04-06 21:06:44,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2022-04-06 21:06:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:44,996 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-04-06 21:06:44,996 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-04-06 21:06:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 21:06:44,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:44,997 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:45,017 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 21:06:45,203 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 21:06:45,204 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash 480105496, now seen corresponding path program 7 times [2022-04-06 21:06:45,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:45,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105406239] [2022-04-06 21:06:45,206 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:45,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash 480105496, now seen corresponding path program 8 times [2022-04-06 21:06:45,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:45,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041396370] [2022-04-06 21:06:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:45,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:45,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:45,290 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 21:06:45,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:45,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041396370] [2022-04-06 21:06:45,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041396370] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:45,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156522567] [2022-04-06 21:06:45,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:45,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:45,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:45,292 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 21:06:45,303 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 21:06:45,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:06:45,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:45,367 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 21:06:45,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:45,446 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 21:06:45,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156522567] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:45,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:45,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-04-06 21:06:45,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:45,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105406239] [2022-04-06 21:06:45,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105406239] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:45,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:45,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:06:45,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198578088] [2022-04-06 21:06:45,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:45,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:06:45,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:45,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:06:45,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:06:45,450 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:45,510 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-04-06 21:06:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:06:45,511 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 21:06:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:45,512 INFO L225 Difference]: With dead ends: 23 [2022-04-06 21:06:45,512 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 21:06:45,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=173, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:06:45,515 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:45,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 21:06:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 21:06:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:45,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-04-06 21:06:45,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-04-06 21:06:45,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:45,521 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-04-06 21:06:45,521 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-04-06 21:06:45,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 21:06:45,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:45,522 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:45,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 21:06:45,743 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 21:06:45,743 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:45,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2033757318, now seen corresponding path program 9 times [2022-04-06 21:06:45,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:45,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919729713] [2022-04-06 21:06:45,745 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:45,746 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2033757318, now seen corresponding path program 10 times [2022-04-06 21:06:45,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:45,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315132470] [2022-04-06 21:06:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:45,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:45,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:45,824 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 21:06:45,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:45,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315132470] [2022-04-06 21:06:45,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315132470] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:45,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105328806] [2022-04-06 21:06:45,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:45,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:45,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:45,826 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 21:06:45,827 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 21:06:45,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:45,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:45,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:06:45,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:45,902 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 21:06:45,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:45,992 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 21:06:45,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105328806] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:45,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:45,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-04-06 21:06:45,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:45,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919729713] [2022-04-06 21:06:45,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919729713] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:45,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:45,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:06:45,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427831794] [2022-04-06 21:06:45,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:45,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:06:45,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:45,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:06:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:06:45,995 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:46,077 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-04-06 21:06:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:06:46,078 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 21:06:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:46,078 INFO L225 Difference]: With dead ends: 24 [2022-04-06 21:06:46,078 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 21:06:46,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=237, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:06:46,079 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:46,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 21:06:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 21:06:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-04-06 21:06:46,083 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-04-06 21:06:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:46,083 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-04-06 21:06:46,083 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-04-06 21:06:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 21:06:46,084 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:46,084 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:46,100 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 21:06:46,285 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 21:06:46,285 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1342643752, now seen corresponding path program 11 times [2022-04-06 21:06:46,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:46,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133195937] [2022-04-06 21:06:46,288 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:46,288 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1342643752, now seen corresponding path program 12 times [2022-04-06 21:06:46,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:46,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084645905] [2022-04-06 21:06:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:46,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:46,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:46,445 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 21:06:46,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084645905] [2022-04-06 21:06:46,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084645905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046198922] [2022-04-06 21:06:46,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:46,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:46,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:46,447 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 21:06:46,451 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 21:06:46,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:06:46,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:46,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 21:06:46,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:46,535 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 21:06:46,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:46,640 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 21:06:46,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046198922] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:46,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:46,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-04-06 21:06:46,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:46,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133195937] [2022-04-06 21:06:46,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133195937] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:46,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:46,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:06:46,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567892284] [2022-04-06 21:06:46,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:46,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:06:46,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:46,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:06:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:06:46,642 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:46,732 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-04-06 21:06:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:06:46,732 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 21:06:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:46,733 INFO L225 Difference]: With dead ends: 25 [2022-04-06 21:06:46,733 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 21:06:46,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=311, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:06:46,734 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:46,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 21:06:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 21:06:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-04-06 21:06:46,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2022-04-06 21:06:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:46,742 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-04-06 21:06:46,742 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-04-06 21:06:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 21:06:46,743 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:46,743 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:46,768 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 21:06:46,965 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 21:06:46,965 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1363105478, now seen corresponding path program 13 times [2022-04-06 21:06:46,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:46,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1698497355] [2022-04-06 21:06:46,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:46,967 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:46,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1363105478, now seen corresponding path program 14 times [2022-04-06 21:06:46,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:46,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460051530] [2022-04-06 21:06:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:46,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:47,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:47,049 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 21:06:47,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:47,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460051530] [2022-04-06 21:06:47,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460051530] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:47,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929001337] [2022-04-06 21:06:47,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:47,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:47,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:47,051 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 21:06:47,066 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 21:06:47,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:47,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:47,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:06:47,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:47,130 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 21:06:47,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:47,261 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 21:06:47,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929001337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:47,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:47,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2022-04-06 21:06:47,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1698497355] [2022-04-06 21:06:47,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1698497355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:47,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:47,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:06:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036374621] [2022-04-06 21:06:47,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:47,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:06:47,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:06:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:06:47,264 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:47,359 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-04-06 21:06:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:06:47,360 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 21:06:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:47,360 INFO L225 Difference]: With dead ends: 26 [2022-04-06 21:06:47,360 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 21:06:47,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=395, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:06:47,361 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:47,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:47,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 21:06:47,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-06 21:06:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-04-06 21:06:47,365 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2022-04-06 21:06:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:47,366 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-04-06 21:06:47,366 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-04-06 21:06:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 21:06:47,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:47,366 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:47,388 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 21:06:47,579 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 21:06:47,580 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash -658014312, now seen corresponding path program 15 times [2022-04-06 21:06:47,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:47,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243770028] [2022-04-06 21:06:47,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:47,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash -658014312, now seen corresponding path program 16 times [2022-04-06 21:06:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:47,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046740510] [2022-04-06 21:06:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:47,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:47,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:47,668 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 21:06:47,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:47,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046740510] [2022-04-06 21:06:47,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046740510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:47,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7136053] [2022-04-06 21:06:47,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:47,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:47,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:47,669 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 21:06:47,671 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 21:06:47,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:47,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:47,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:06:47,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:47,740 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 21:06:47,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:47,887 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 21:06:47,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7136053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:47,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:47,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2022-04-06 21:06:47,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:47,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243770028] [2022-04-06 21:06:47,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243770028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:47,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:47,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:06:47,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663177071] [2022-04-06 21:06:47,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:47,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:06:47,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:47,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:06:47,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:06:47,889 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:47,985 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-04-06 21:06:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:06:47,985 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 21:06:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:47,986 INFO L225 Difference]: With dead ends: 27 [2022-04-06 21:06:47,986 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 21:06:47,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=381, Invalid=489, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:06:47,987 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:47,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 21:06:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 21:06:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-04-06 21:06:47,990 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2022-04-06 21:06:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:47,990 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-04-06 21:06:47,990 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-04-06 21:06:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 21:06:47,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:47,991 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:48,016 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 21:06:48,203 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 21:06:48,204 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1111781638, now seen corresponding path program 17 times [2022-04-06 21:06:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:48,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1426196110] [2022-04-06 21:06:48,205 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:48,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:48,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1111781638, now seen corresponding path program 18 times [2022-04-06 21:06:48,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:48,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41344274] [2022-04-06 21:06:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:48,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:48,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:48,307 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 21:06:48,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41344274] [2022-04-06 21:06:48,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41344274] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850754711] [2022-04-06 21:06:48,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:48,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:48,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:48,309 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 21:06:48,313 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 21:06:48,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 21:06:48,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:48,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:06:48,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:48,391 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 21:06:48,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:48,561 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 21:06:48,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850754711] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:48,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:48,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 23 [2022-04-06 21:06:48,562 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:48,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1426196110] [2022-04-06 21:06:48,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1426196110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:48,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:48,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:06:48,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70191767] [2022-04-06 21:06:48,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:48,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:06:48,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:48,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:06:48,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:06:48,563 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:48,674 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-04-06 21:06:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:06:48,674 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 21:06:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:48,675 INFO L225 Difference]: With dead ends: 28 [2022-04-06 21:06:48,675 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 21:06:48,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=463, Invalid=593, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:06:48,676 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:48,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 21:06:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 21:06:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-04-06 21:06:48,680 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2022-04-06 21:06:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:48,680 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-04-06 21:06:48,680 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-04-06 21:06:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:06:48,681 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:48,681 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:48,697 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 21:06:48,884 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 21:06:48,884 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash 140881240, now seen corresponding path program 19 times [2022-04-06 21:06:48,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:48,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1594499598] [2022-04-06 21:06:48,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:48,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 140881240, now seen corresponding path program 20 times [2022-04-06 21:06:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:48,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725438123] [2022-04-06 21:06:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:48,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:49,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:49,007 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 21:06:49,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:49,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725438123] [2022-04-06 21:06:49,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725438123] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:49,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642542923] [2022-04-06 21:06:49,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:49,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:49,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:49,016 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 21:06:49,044 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 21:06:49,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:49,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:49,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 21:06:49,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:49,098 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 21:06:49,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:49,267 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 21:06:49,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642542923] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:49,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:49,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-04-06 21:06:49,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1594499598] [2022-04-06 21:06:49,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1594499598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:49,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:49,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:06:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485184089] [2022-04-06 21:06:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:49,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:06:49,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:49,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:06:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:06:49,270 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:49,389 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-04-06 21:06:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:06:49,389 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 21:06:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:49,392 INFO L225 Difference]: With dead ends: 29 [2022-04-06 21:06:49,392 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 21:06:49,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=553, Invalid=707, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 21:06:49,393 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:49,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 21:06:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 21:06:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-04-06 21:06:49,401 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2022-04-06 21:06:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:49,401 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-04-06 21:06:49,401 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-04-06 21:06:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 21:06:49,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:49,402 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:49,426 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 21:06:49,623 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 21:06:49,623 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash 107739974, now seen corresponding path program 21 times [2022-04-06 21:06:49,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:49,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909883818] [2022-04-06 21:06:49,625 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:49,625 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:49,625 INFO L85 PathProgramCache]: Analyzing trace with hash 107739974, now seen corresponding path program 22 times [2022-04-06 21:06:49,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:49,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342660668] [2022-04-06 21:06:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:49,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:49,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:49,733 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 21:06:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:49,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342660668] [2022-04-06 21:06:49,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342660668] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:49,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773106780] [2022-04-06 21:06:49,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:49,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:49,735 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 21:06:49,759 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 21:06:49,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:49,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:49,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:06:49,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:49,832 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 21:06:49,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:50,074 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 21:06:50,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773106780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:50,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:50,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2022-04-06 21:06:50,075 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:50,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909883818] [2022-04-06 21:06:50,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909883818] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:50,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:50,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:06:50,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886257980] [2022-04-06 21:06:50,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:50,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:06:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:06:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:06:50,077 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:50,222 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-04-06 21:06:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:06:50,222 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 21:06:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:50,223 INFO L225 Difference]: With dead ends: 30 [2022-04-06 21:06:50,223 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 21:06:50,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=651, Invalid=831, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:06:50,225 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:50,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 21:06:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 21:06:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-04-06 21:06:50,228 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2022-04-06 21:06:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:50,228 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-04-06 21:06:50,228 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-04-06 21:06:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 21:06:50,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:50,229 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:50,253 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 21:06:50,439 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 21:06:50,439 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash -919639272, now seen corresponding path program 23 times [2022-04-06 21:06:50,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:50,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [776148843] [2022-04-06 21:06:50,441 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:50,441 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:50,441 INFO L85 PathProgramCache]: Analyzing trace with hash -919639272, now seen corresponding path program 24 times [2022-04-06 21:06:50,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:50,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772793767] [2022-04-06 21:06:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:50,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:50,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:50,560 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 21:06:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:50,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772793767] [2022-04-06 21:06:50,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772793767] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:50,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085758754] [2022-04-06 21:06:50,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:50,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:50,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:50,562 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 21:06:50,562 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 21:06:50,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:06:50,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:50,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:06:50,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:50,634 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 21:06:50,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:50,912 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 21:06:50,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085758754] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:50,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:50,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 29 [2022-04-06 21:06:50,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [776148843] [2022-04-06 21:06:50,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [776148843] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:50,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:50,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:06:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598784357] [2022-04-06 21:06:50,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:50,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:06:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:06:50,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:06:50,915 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:51,079 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-04-06 21:06:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:06:51,080 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 21:06:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:51,080 INFO L225 Difference]: With dead ends: 31 [2022-04-06 21:06:51,080 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 21:06:51,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=757, Invalid=965, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 21:06:51,081 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:51,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 21:06:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 21:06:51,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-04-06 21:06:51,085 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2022-04-06 21:06:51,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:51,085 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-04-06 21:06:51,085 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-04-06 21:06:51,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 21:06:51,086 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:51,086 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:51,108 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 21:06:51,297 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 21:06:51,298 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:51,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1591342470, now seen corresponding path program 25 times [2022-04-06 21:06:51,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:51,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2086623657] [2022-04-06 21:06:51,300 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:51,300 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1591342470, now seen corresponding path program 26 times [2022-04-06 21:06:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:51,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431246252] [2022-04-06 21:06:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:51,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:51,436 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 21:06:51,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:51,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431246252] [2022-04-06 21:06:51,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431246252] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:51,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603769525] [2022-04-06 21:06:51,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:51,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:51,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:51,438 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:51,441 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 21:06:51,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:51,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:51,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:06:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:51,530 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 21:06:51,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:51,808 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 21:06:51,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603769525] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:51,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:51,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 31 [2022-04-06 21:06:51,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:51,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2086623657] [2022-04-06 21:06:51,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2086623657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:51,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:51,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:06:51,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326100654] [2022-04-06 21:06:51,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:51,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:06:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:51,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:06:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:06:51,810 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:51,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:51,972 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-06 21:06:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:06:51,973 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 21:06:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:51,973 INFO L225 Difference]: With dead ends: 32 [2022-04-06 21:06:51,973 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 21:06:51,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=871, Invalid=1109, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:06:51,975 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:51,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 21:06:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 21:06:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-04-06 21:06:51,978 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2022-04-06 21:06:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:51,978 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-04-06 21:06:51,978 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-04-06 21:06:51,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 21:06:51,979 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:51,979 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:52,000 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 21:06:52,179 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 21:06:52,180 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2122365144, now seen corresponding path program 27 times [2022-04-06 21:06:52,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:52,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1568355160] [2022-04-06 21:06:52,181 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:52,181 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2122365144, now seen corresponding path program 28 times [2022-04-06 21:06:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:52,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161090239] [2022-04-06 21:06:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:52,327 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 21:06:52,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161090239] [2022-04-06 21:06:52,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161090239] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:52,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815066682] [2022-04-06 21:06:52,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:52,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:52,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:52,331 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 21:06:52,349 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 21:06:52,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:52,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 21:06:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:52,433 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 21:06:52,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:52,722 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 21:06:52,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815066682] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:52,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:52,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2022-04-06 21:06:52,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:52,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1568355160] [2022-04-06 21:06:52,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1568355160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:52,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:52,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:06:52,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015408363] [2022-04-06 21:06:52,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:52,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:06:52,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:52,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:06:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:06:52,724 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:52,907 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-04-06 21:06:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:06:52,908 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 21:06:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:52,909 INFO L225 Difference]: With dead ends: 33 [2022-04-06 21:06:52,910 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 21:06:52,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=993, Invalid=1263, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 21:06:52,911 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:52,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 21:06:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 21:06:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-04-06 21:06:52,914 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2022-04-06 21:06:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:52,914 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-04-06 21:06:52,914 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-04-06 21:06:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 21:06:52,915 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:52,915 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:52,941 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 21:06:53,127 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 21:06:53,128 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:53,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:53,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1404198854, now seen corresponding path program 29 times [2022-04-06 21:06:53,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:53,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [331909081] [2022-04-06 21:06:53,129 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:53,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1404198854, now seen corresponding path program 30 times [2022-04-06 21:06:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:53,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256449069] [2022-04-06 21:06:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:53,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:53,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:53,269 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 21:06:53,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:53,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256449069] [2022-04-06 21:06:53,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256449069] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:53,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015382469] [2022-04-06 21:06:53,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:53,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:53,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:53,271 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 21:06:53,272 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 21:06:53,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 21:06:53,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:53,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 21:06:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:53,350 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 21:06:53,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:53,655 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 21:06:53,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015382469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:53,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:53,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 35 [2022-04-06 21:06:53,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:53,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [331909081] [2022-04-06 21:06:53,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [331909081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:53,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:53,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:06:53,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696243083] [2022-04-06 21:06:53,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:53,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:06:53,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:53,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:06:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:06:53,658 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:53,865 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-04-06 21:06:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:06:53,866 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 21:06:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:53,866 INFO L225 Difference]: With dead ends: 34 [2022-04-06 21:06:53,866 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 21:06:53,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1123, Invalid=1427, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:06:53,868 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:53,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:53,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 21:06:53,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 21:06:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-04-06 21:06:53,871 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2022-04-06 21:06:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:53,871 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-04-06 21:06:53,871 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:53,872 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-04-06 21:06:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 21:06:53,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:53,872 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:53,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:54,083 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 21:06:54,083 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:54,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:54,084 INFO L85 PathProgramCache]: Analyzing trace with hash 615880344, now seen corresponding path program 31 times [2022-04-06 21:06:54,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020063995] [2022-04-06 21:06:54,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:54,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash 615880344, now seen corresponding path program 32 times [2022-04-06 21:06:54,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:54,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963329443] [2022-04-06 21:06:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:54,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:54,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:54,256 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 21:06:54,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:54,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963329443] [2022-04-06 21:06:54,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963329443] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:54,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831815305] [2022-04-06 21:06:54,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:54,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:54,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:54,259 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 21:06:54,267 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 21:06:54,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:54,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:54,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:06:54,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:54,355 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 21:06:54,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:54,757 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 21:06:54,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831815305] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:54,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:54,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 37 [2022-04-06 21:06:54,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:54,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020063995] [2022-04-06 21:06:54,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020063995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:54,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:54,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:06:54,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704699203] [2022-04-06 21:06:54,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:54,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:06:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:06:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:06:54,759 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:54,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:54,959 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-04-06 21:06:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:06:54,960 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 21:06:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:54,960 INFO L225 Difference]: With dead ends: 35 [2022-04-06 21:06:54,960 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 21:06:54,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1261, Invalid=1601, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 21:06:54,962 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:54,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:54,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 21:06:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 21:06:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-04-06 21:06:54,964 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2022-04-06 21:06:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:54,965 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-04-06 21:06:54,965 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-04-06 21:06:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 21:06:54,965 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:54,965 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:54,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:55,171 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 21:06:55,172 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:55,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1947810310, now seen corresponding path program 33 times [2022-04-06 21:06:55,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:55,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335560641] [2022-04-06 21:06:55,173 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:55,174 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:55,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1947810310, now seen corresponding path program 34 times [2022-04-06 21:06:55,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:55,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828577128] [2022-04-06 21:06:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:55,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:55,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:55,335 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 21:06:55,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:55,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828577128] [2022-04-06 21:06:55,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828577128] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:55,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758443679] [2022-04-06 21:06:55,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:55,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:55,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:55,337 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 21:06:55,337 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 21:06:55,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:55,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:55,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:06:55,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:55,427 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 21:06:55,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:55,792 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 21:06:55,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758443679] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:55,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:55,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 39 [2022-04-06 21:06:55,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:55,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335560641] [2022-04-06 21:06:55,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335560641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:55,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:55,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:06:55,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139706154] [2022-04-06 21:06:55,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:55,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:06:55,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:55,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:06:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:06:55,795 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:55,991 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-04-06 21:06:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:06:55,992 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 21:06:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:55,992 INFO L225 Difference]: With dead ends: 36 [2022-04-06 21:06:55,992 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 21:06:55,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1407, Invalid=1785, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:06:55,993 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:55,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 21:06:55,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 21:06:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-06 21:06:55,996 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2022-04-06 21:06:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:55,997 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-06 21:06:55,997 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-06 21:06:55,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 21:06:55,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:55,997 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:56,017 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 21:06:56,211 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 21:06:56,212 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:56,212 INFO L85 PathProgramCache]: Analyzing trace with hash 287966296, now seen corresponding path program 35 times [2022-04-06 21:06:56,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:56,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909679836] [2022-04-06 21:06:56,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:56,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:56,213 INFO L85 PathProgramCache]: Analyzing trace with hash 287966296, now seen corresponding path program 36 times [2022-04-06 21:06:56,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:56,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912838801] [2022-04-06 21:06:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:56,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:56,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:56,395 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 21:06:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912838801] [2022-04-06 21:06:56,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912838801] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106954573] [2022-04-06 21:06:56,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:06:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:56,397 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 21:06:56,398 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 21:06:56,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 21:06:56,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:56,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 21:06:56,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:56,483 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 21:06:56,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:56,924 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 21:06:56,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106954573] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:56,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:56,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 41 [2022-04-06 21:06:56,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:56,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909679836] [2022-04-06 21:06:56,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909679836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:56,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:56,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:06:56,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843472388] [2022-04-06 21:06:56,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:56,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:06:56,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:56,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:06:56,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:06:56,926 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:57,154 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-04-06 21:06:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:06:57,155 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 21:06:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:57,155 INFO L225 Difference]: With dead ends: 37 [2022-04-06 21:06:57,155 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 21:06:57,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1561, Invalid=1979, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 21:06:57,157 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:57,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 21:06:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 21:06:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-04-06 21:06:57,160 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2022-04-06 21:06:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:57,161 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-04-06 21:06:57,161 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-04-06 21:06:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 21:06:57,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:57,162 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:57,179 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 21:06:57,363 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 21:06:57,363 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash 372409414, now seen corresponding path program 37 times [2022-04-06 21:06:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082604134] [2022-04-06 21:06:57,365 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:57,365 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash 372409414, now seen corresponding path program 38 times [2022-04-06 21:06:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:57,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082623761] [2022-04-06 21:06:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:57,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:57,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:57,580 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 21:06:57,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082623761] [2022-04-06 21:06:57,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082623761] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:57,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055092670] [2022-04-06 21:06:57,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:57,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:57,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:57,582 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 21:06:57,587 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 21:06:57,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:57,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:57,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:06:57,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:57,684 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 21:06:57,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:58,164 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 21:06:58,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055092670] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:58,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:58,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 43 [2022-04-06 21:06:58,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:58,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082604134] [2022-04-06 21:06:58,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082604134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:58,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:58,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:06:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279662591] [2022-04-06 21:06:58,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:58,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:06:58,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:58,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:06:58,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:06:58,167 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:58,408 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-04-06 21:06:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:06:58,409 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 21:06:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:58,409 INFO L225 Difference]: With dead ends: 38 [2022-04-06 21:06:58,409 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 21:06:58,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1723, Invalid=2183, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 21:06:58,411 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:58,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 21:06:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 21:06:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-04-06 21:06:58,414 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2022-04-06 21:06:58,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:58,414 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-04-06 21:06:58,414 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-04-06 21:06:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:06:58,415 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:58,415 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:58,439 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 21:06:58,628 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 21:06:58,628 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1304821224, now seen corresponding path program 39 times [2022-04-06 21:06:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:58,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717086191] [2022-04-06 21:06:58,629 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:58,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1304821224, now seen corresponding path program 40 times [2022-04-06 21:06:58,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:58,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443668707] [2022-04-06 21:06:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:58,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:58,857 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 21:06:58,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:58,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443668707] [2022-04-06 21:06:58,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443668707] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:58,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659400327] [2022-04-06 21:06:58,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:58,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:58,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:58,860 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 21:06:58,883 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 21:06:58,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:58,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:58,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:06:58,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:58,974 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 21:06:58,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:59,484 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 21:06:59,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659400327] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:59,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:59,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 45 [2022-04-06 21:06:59,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:59,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717086191] [2022-04-06 21:06:59,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717086191] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:59,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:59,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 21:06:59,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823857847] [2022-04-06 21:06:59,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:59,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 21:06:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:59,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 21:06:59,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:06:59,487 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:59,774 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-04-06 21:06:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:06:59,774 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 21:06:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:59,774 INFO L225 Difference]: With dead ends: 39 [2022-04-06 21:06:59,774 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 21:06:59,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1893, Invalid=2397, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:06:59,776 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:59,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:06:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 21:06:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 21:06:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-04-06 21:06:59,780 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2022-04-06 21:06:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:59,780 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-04-06 21:06:59,780 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-04-06 21:06:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 21:06:59,780 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:59,780 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:59,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 21:06:59,987 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 21:06:59,987 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:59,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1759363450, now seen corresponding path program 41 times [2022-04-06 21:06:59,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:59,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [161130611] [2022-04-06 21:06:59,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:59,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1759363450, now seen corresponding path program 42 times [2022-04-06 21:06:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:59,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110593987] [2022-04-06 21:06:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:59,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:00,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:00,236 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 21:07:00,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:00,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110593987] [2022-04-06 21:07:00,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110593987] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:00,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057838021] [2022-04-06 21:07:00,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:00,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:00,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:00,240 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 21:07:00,241 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 21:07:00,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 21:07:00,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:00,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 21:07:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:00,341 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 21:07:00,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:00,849 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 21:07:00,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057838021] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:00,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:00,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 47 [2022-04-06 21:07:00,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:00,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [161130611] [2022-04-06 21:07:00,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [161130611] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:00,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:00,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:07:00,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690361963] [2022-04-06 21:07:00,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:00,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:07:00,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:00,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:07:00,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:07:00,852 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:01,161 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-04-06 21:07:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 21:07:01,162 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 21:07:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:01,162 INFO L225 Difference]: With dead ends: 40 [2022-04-06 21:07:01,162 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 21:07:01,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2071, Invalid=2621, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 21:07:01,164 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:01,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 21:07:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 21:07:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-04-06 21:07:01,167 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2022-04-06 21:07:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:01,167 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-04-06 21:07:01,167 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-04-06 21:07:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 21:07:01,168 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:01,168 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:01,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:01,379 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 21:07:01,379 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:01,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1329696728, now seen corresponding path program 43 times [2022-04-06 21:07:01,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:01,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1054067821] [2022-04-06 21:07:01,381 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:01,381 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1329696728, now seen corresponding path program 44 times [2022-04-06 21:07:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:01,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333572707] [2022-04-06 21:07:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:01,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:01,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:01,632 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 21:07:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333572707] [2022-04-06 21:07:01,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333572707] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276341946] [2022-04-06 21:07:01,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:01,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:01,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:01,633 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 21:07:01,634 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 21:07:01,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:01,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:01,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:07:01,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:01,727 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 21:07:01,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:02,270 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 21:07:02,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276341946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:02,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:02,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 49 [2022-04-06 21:07:02,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:02,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1054067821] [2022-04-06 21:07:02,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1054067821] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:02,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:02,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 21:07:02,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272838653] [2022-04-06 21:07:02,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:02,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 21:07:02,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 21:07:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:07:02,273 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:02,572 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-04-06 21:07:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:07:02,572 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 21:07:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:02,573 INFO L225 Difference]: With dead ends: 41 [2022-04-06 21:07:02,573 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 21:07:02,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2257, Invalid=2855, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 21:07:02,575 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:02,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 21:07:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 21:07:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-04-06 21:07:02,578 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2022-04-06 21:07:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:02,578 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-04-06 21:07:02,578 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-04-06 21:07:02,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 21:07:02,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:02,578 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:02,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:02,791 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 21:07:02,791 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1693685562, now seen corresponding path program 45 times [2022-04-06 21:07:02,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:02,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1639939051] [2022-04-06 21:07:02,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:02,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:02,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1693685562, now seen corresponding path program 46 times [2022-04-06 21:07:02,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:02,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502921077] [2022-04-06 21:07:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:02,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:03,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:03,048 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 21:07:03,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:03,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502921077] [2022-04-06 21:07:03,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502921077] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:03,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360902533] [2022-04-06 21:07:03,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:03,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:03,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:03,056 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 21:07:03,057 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 21:07:03,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:03,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 21:07:03,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:03,173 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 21:07:03,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:03,759 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 21:07:03,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360902533] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:03,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:03,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 51 [2022-04-06 21:07:03,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:03,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1639939051] [2022-04-06 21:07:03,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1639939051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:03,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:03,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:07:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270454920] [2022-04-06 21:07:03,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:03,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:07:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:07:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:07:03,761 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:04,068 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-04-06 21:07:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 21:07:04,069 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 21:07:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:04,069 INFO L225 Difference]: With dead ends: 42 [2022-04-06 21:07:04,069 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 21:07:04,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2451, Invalid=3099, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 21:07:04,071 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:04,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:04,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 21:07:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 21:07:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-04-06 21:07:04,073 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2022-04-06 21:07:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:04,074 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-04-06 21:07:04,074 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:04,074 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-04-06 21:07:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 21:07:04,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:04,074 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:04,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:04,279 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 21:07:04,279 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:04,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash -929256040, now seen corresponding path program 47 times [2022-04-06 21:07:04,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:04,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [909901067] [2022-04-06 21:07:04,280 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:04,281 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:04,281 INFO L85 PathProgramCache]: Analyzing trace with hash -929256040, now seen corresponding path program 48 times [2022-04-06 21:07:04,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:04,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516078324] [2022-04-06 21:07:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:04,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:04,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:04,540 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 21:07:04,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:04,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516078324] [2022-04-06 21:07:04,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516078324] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:04,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996927207] [2022-04-06 21:07:04,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:04,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:04,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:04,541 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 21:07:04,542 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 21:07:04,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 21:07:04,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 21:07:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:04,643 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 21:07:04,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:05,284 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 21:07:05,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996927207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:05,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:05,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 53 [2022-04-06 21:07:05,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [909901067] [2022-04-06 21:07:05,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [909901067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:05,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:05,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 21:07:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650078797] [2022-04-06 21:07:05,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:05,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 21:07:05,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 21:07:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 21:07:05,286 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:05,597 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-04-06 21:07:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:07:05,597 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 21:07:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:05,598 INFO L225 Difference]: With dead ends: 43 [2022-04-06 21:07:05,598 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 21:07:05,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2653, Invalid=3353, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 21:07:05,599 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:05,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 21:07:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 21:07:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-04-06 21:07:05,603 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2022-04-06 21:07:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:05,603 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-04-06 21:07:05,603 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-04-06 21:07:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 21:07:05,603 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:05,604 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:05,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 21:07:05,815 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 21:07:05,816 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1293222662, now seen corresponding path program 49 times [2022-04-06 21:07:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:05,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2121139939] [2022-04-06 21:07:05,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:05,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:05,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1293222662, now seen corresponding path program 50 times [2022-04-06 21:07:05,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:05,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183001916] [2022-04-06 21:07:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:05,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:06,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:06,123 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 21:07:06,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:06,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183001916] [2022-04-06 21:07:06,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183001916] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234887544] [2022-04-06 21:07:06,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:06,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:06,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:06,125 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 21:07:06,125 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 21:07:06,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:06,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:07:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:06,233 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 21:07:06,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:06,933 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 21:07:06,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234887544] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:06,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:06,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 55 [2022-04-06 21:07:06,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:06,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2121139939] [2022-04-06 21:07:06,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2121139939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:06,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:06,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:07:06,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41580423] [2022-04-06 21:07:06,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:06,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:07:06,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:06,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:07:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 21:07:06,936 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:07,286 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-04-06 21:07:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 21:07:07,287 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 21:07:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:07,287 INFO L225 Difference]: With dead ends: 44 [2022-04-06 21:07:07,287 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 21:07:07,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2863, Invalid=3617, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 21:07:07,289 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:07,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 21:07:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 21:07:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-04-06 21:07:07,292 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2022-04-06 21:07:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:07,292 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-04-06 21:07:07,292 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-04-06 21:07:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 21:07:07,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:07,292 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:07,312 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 21:07:07,503 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 21:07:07,503 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1470585688, now seen corresponding path program 51 times [2022-04-06 21:07:07,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:07,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1509705505] [2022-04-06 21:07:07,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:07,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:07,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1470585688, now seen corresponding path program 52 times [2022-04-06 21:07:07,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:07,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100523099] [2022-04-06 21:07:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:07,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:07,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:07,800 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 21:07:07,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:07,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100523099] [2022-04-06 21:07:07,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100523099] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:07,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774943269] [2022-04-06 21:07:07,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:07,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:07,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:07,803 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 21:07:07,831 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 21:07:07,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:07,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:07,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:07:07,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:07,915 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 21:07:07,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:08,685 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 21:07:08,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774943269] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:08,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:08,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 57 [2022-04-06 21:07:08,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:08,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1509705505] [2022-04-06 21:07:08,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1509705505] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:08,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:08,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 21:07:08,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932667753] [2022-04-06 21:07:08,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:08,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 21:07:08,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:08,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 21:07:08,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:07:08,688 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:09,062 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-04-06 21:07:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:07:09,062 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 21:07:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:09,062 INFO L225 Difference]: With dead ends: 45 [2022-04-06 21:07:09,062 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 21:07:09,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3891, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:07:09,063 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:09,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:09,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 21:07:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 21:07:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-04-06 21:07:09,066 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2022-04-06 21:07:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:09,066 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-04-06 21:07:09,067 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-04-06 21:07:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 21:07:09,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:09,067 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:09,083 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 21:07:09,267 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 21:07:09,268 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:09,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1621095098, now seen corresponding path program 53 times [2022-04-06 21:07:09,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:09,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2129319791] [2022-04-06 21:07:09,269 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:09,269 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:09,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1621095098, now seen corresponding path program 54 times [2022-04-06 21:07:09,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:09,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290598583] [2022-04-06 21:07:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:09,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:09,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:09,605 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 21:07:09,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:09,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290598583] [2022-04-06 21:07:09,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290598583] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:09,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121214322] [2022-04-06 21:07:09,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:09,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:09,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:09,607 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 21:07:09,633 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 21:07:09,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 21:07:09,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:09,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 21:07:09,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:09,732 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 21:07:09,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:10,569 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 21:07:10,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121214322] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:10,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:10,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 59 [2022-04-06 21:07:10,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:10,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2129319791] [2022-04-06 21:07:10,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2129319791] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:10,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:10,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:07:10,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261186835] [2022-04-06 21:07:10,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:10,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:07:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:07:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 21:07:10,571 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:10,984 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-04-06 21:07:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 21:07:10,984 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 21:07:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:10,984 INFO L225 Difference]: With dead ends: 46 [2022-04-06 21:07:10,984 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 21:07:10,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3307, Invalid=4175, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 21:07:10,986 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:10,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:10,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 21:07:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-04-06 21:07:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-04-06 21:07:10,989 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2022-04-06 21:07:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:10,989 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-04-06 21:07:10,989 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-04-06 21:07:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 21:07:10,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:10,989 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:11,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:11,203 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 21:07:11,203 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:11,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1321048344, now seen corresponding path program 55 times [2022-04-06 21:07:11,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:11,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [101184143] [2022-04-06 21:07:11,205 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:11,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1321048344, now seen corresponding path program 56 times [2022-04-06 21:07:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:11,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890105062] [2022-04-06 21:07:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:11,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:11,550 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 21:07:11,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890105062] [2022-04-06 21:07:11,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890105062] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380163633] [2022-04-06 21:07:11,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:11,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:11,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:11,552 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 21:07:11,553 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 21:07:11,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:11,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:11,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 21:07:11,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:11,657 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 21:07:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:12,531 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 21:07:12,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380163633] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:12,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:12,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 61 [2022-04-06 21:07:12,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:12,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [101184143] [2022-04-06 21:07:12,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [101184143] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:12,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:12,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 21:07:12,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935766147] [2022-04-06 21:07:12,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:12,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 21:07:12,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:12,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 21:07:12,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 21:07:12,533 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:12,967 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-04-06 21:07:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:07:12,967 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 21:07:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:12,967 INFO L225 Difference]: With dead ends: 47 [2022-04-06 21:07:12,968 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 21:07:12,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3541, Invalid=4469, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:07:12,969 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:12,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 21:07:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 21:07:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-04-06 21:07:12,971 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2022-04-06 21:07:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:12,972 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-04-06 21:07:12,972 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-04-06 21:07:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:07:12,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:12,972 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:12,994 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 21:07:13,173 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 21:07:13,174 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:13,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1961785466, now seen corresponding path program 57 times [2022-04-06 21:07:13,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:13,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [713233231] [2022-04-06 21:07:13,175 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:13,175 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1961785466, now seen corresponding path program 58 times [2022-04-06 21:07:13,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:13,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50825168] [2022-04-06 21:07:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:13,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:13,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:13,523 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 21:07:13,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:13,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50825168] [2022-04-06 21:07:13,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50825168] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:13,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567636252] [2022-04-06 21:07:13,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:13,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:13,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:13,524 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 21:07:13,525 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 21:07:13,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:13,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:13,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 21:07:13,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:13,637 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 21:07:13,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:14,515 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 21:07:14,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567636252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:14,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:14,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 63 [2022-04-06 21:07:14,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:14,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [713233231] [2022-04-06 21:07:14,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [713233231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:14,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:14,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:07:14,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767482386] [2022-04-06 21:07:14,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:14,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:07:14,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:07:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 21:07:14,518 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:14,957 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-04-06 21:07:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 21:07:14,958 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 21:07:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:14,958 INFO L225 Difference]: With dead ends: 48 [2022-04-06 21:07:14,958 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 21:07:14,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3783, Invalid=4773, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 21:07:14,960 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:14,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 21:07:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 21:07:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-04-06 21:07:14,963 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2022-04-06 21:07:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:14,963 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-04-06 21:07:14,963 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-04-06 21:07:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 21:07:14,964 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:14,964 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:14,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 21:07:15,179 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 21:07:15,179 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:15,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:15,180 INFO L85 PathProgramCache]: Analyzing trace with hash -650418472, now seen corresponding path program 59 times [2022-04-06 21:07:15,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:15,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1293132585] [2022-04-06 21:07:15,181 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:15,181 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:15,181 INFO L85 PathProgramCache]: Analyzing trace with hash -650418472, now seen corresponding path program 60 times [2022-04-06 21:07:15,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:15,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210997184] [2022-04-06 21:07:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:15,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:15,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:15,570 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 21:07:15,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210997184] [2022-04-06 21:07:15,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210997184] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695311069] [2022-04-06 21:07:15,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:15,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:15,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:15,572 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 21:07:15,572 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 21:07:15,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 21:07:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:15,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 21:07:15,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:15,688 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 21:07:15,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:16,633 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 21:07:16,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695311069] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:16,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:16,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 65 [2022-04-06 21:07:16,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:16,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1293132585] [2022-04-06 21:07:16,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1293132585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:16,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:16,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 21:07:16,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901582163] [2022-04-06 21:07:16,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:16,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 21:07:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 21:07:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 21:07:16,635 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:17,135 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-04-06 21:07:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:07:17,136 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 21:07:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:17,136 INFO L225 Difference]: With dead ends: 49 [2022-04-06 21:07:17,136 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 21:07:17,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4033, Invalid=5087, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 21:07:17,138 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:17,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 21:07:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 21:07:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-04-06 21:07:17,140 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2022-04-06 21:07:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:17,140 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-04-06 21:07:17,140 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-04-06 21:07:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 21:07:17,141 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:17,141 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:17,157 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 21:07:17,341 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 21:07:17,342 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1347252678, now seen corresponding path program 61 times [2022-04-06 21:07:17,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:17,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [449742651] [2022-04-06 21:07:17,343 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:17,343 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:17,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1347252678, now seen corresponding path program 62 times [2022-04-06 21:07:17,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154152844] [2022-04-06 21:07:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:17,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:17,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:17,780 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 21:07:17,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:17,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154152844] [2022-04-06 21:07:17,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154152844] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:17,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790451867] [2022-04-06 21:07:17,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:17,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:17,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:17,784 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 21:07:17,795 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 21:07:17,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:17,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:17,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 21:07:17,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:17,898 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 21:07:17,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:18,903 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 21:07:18,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790451867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:18,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:18,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 67 [2022-04-06 21:07:18,904 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [449742651] [2022-04-06 21:07:18,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [449742651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:18,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:18,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:07:18,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665362139] [2022-04-06 21:07:18,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:18,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:07:18,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:07:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 21:07:18,906 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:19,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:19,418 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-04-06 21:07:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 21:07:19,418 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 21:07:19,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:19,418 INFO L225 Difference]: With dead ends: 50 [2022-04-06 21:07:19,419 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 21:07:19,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4291, Invalid=5411, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 21:07:19,420 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:19,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 21:07:19,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 21:07:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-04-06 21:07:19,423 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2022-04-06 21:07:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:19,424 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-04-06 21:07:19,424 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-04-06 21:07:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 21:07:19,424 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:19,424 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:19,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 21:07:19,631 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 21:07:19,631 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1149451112, now seen corresponding path program 63 times [2022-04-06 21:07:19,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:19,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1698140090] [2022-04-06 21:07:19,633 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:19,633 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:19,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1149451112, now seen corresponding path program 64 times [2022-04-06 21:07:19,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:19,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765858098] [2022-04-06 21:07:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:19,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:20,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:20,087 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 21:07:20,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:20,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765858098] [2022-04-06 21:07:20,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765858098] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:20,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876465749] [2022-04-06 21:07:20,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:20,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:20,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:20,092 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 21:07:20,104 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 21:07:20,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:20,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:20,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:07:20,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:20,213 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 21:07:20,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:21,293 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 21:07:21,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876465749] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:21,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:21,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 69 [2022-04-06 21:07:21,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:21,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1698140090] [2022-04-06 21:07:21,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1698140090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:21,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:21,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 21:07:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33195714] [2022-04-06 21:07:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:21,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 21:07:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 21:07:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 21:07:21,295 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:21,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:21,839 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-04-06 21:07:21,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:07:21,839 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 21:07:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:21,839 INFO L225 Difference]: With dead ends: 51 [2022-04-06 21:07:21,839 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 21:07:21,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4557, Invalid=5745, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 21:07:21,841 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:21,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 21:07:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 21:07:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-04-06 21:07:21,844 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2022-04-06 21:07:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:21,844 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-04-06 21:07:21,844 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-04-06 21:07:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 21:07:21,845 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:21,845 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:21,861 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 21:07:22,051 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 21:07:22,051 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1237857274, now seen corresponding path program 65 times [2022-04-06 21:07:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:22,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117488002] [2022-04-06 21:07:22,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:22,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:22,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1237857274, now seen corresponding path program 66 times [2022-04-06 21:07:22,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:22,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391809453] [2022-04-06 21:07:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:22,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:22,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:22,476 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 21:07:22,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:22,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391809453] [2022-04-06 21:07:22,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391809453] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:22,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693808179] [2022-04-06 21:07:22,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:22,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:22,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:22,486 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 21:07:22,486 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 21:07:22,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-06 21:07:22,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:22,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 21:07:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:22,608 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 21:07:22,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:23,701 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 21:07:23,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693808179] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:23,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:23,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 71 [2022-04-06 21:07:23,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1117488002] [2022-04-06 21:07:23,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1117488002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:23,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:23,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:07:23,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355952577] [2022-04-06 21:07:23,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:23,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:07:23,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:23,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:07:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 21:07:23,705 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:24,234 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-04-06 21:07:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 21:07:24,234 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 21:07:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:24,235 INFO L225 Difference]: With dead ends: 52 [2022-04-06 21:07:24,235 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 21:07:24,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4831, Invalid=6089, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 21:07:24,236 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:24,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 21:07:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 21:07:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-04-06 21:07:24,238 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2022-04-06 21:07:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:24,238 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-04-06 21:07:24,238 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-04-06 21:07:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 21:07:24,238 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:24,238 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:24,254 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 21:07:24,439 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 21:07:24,439 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 316519000, now seen corresponding path program 67 times [2022-04-06 21:07:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:24,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282900482] [2022-04-06 21:07:24,440 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:24,440 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:24,441 INFO L85 PathProgramCache]: Analyzing trace with hash 316519000, now seen corresponding path program 68 times [2022-04-06 21:07:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:24,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232052169] [2022-04-06 21:07:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:24,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:24,963 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 21:07:24,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:24,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232052169] [2022-04-06 21:07:24,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232052169] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:24,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968016338] [2022-04-06 21:07:24,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:24,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:24,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:24,964 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 21:07:24,972 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 21:07:25,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:25,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:25,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 21:07:25,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:25,084 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 21:07:25,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:26,247 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 21:07:26,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968016338] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:26,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:26,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 73 [2022-04-06 21:07:26,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:26,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282900482] [2022-04-06 21:07:26,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282900482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:26,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:26,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 21:07:26,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428153124] [2022-04-06 21:07:26,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:26,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 21:07:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:26,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 21:07:26,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 21:07:26,249 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:26,777 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-04-06 21:07:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:07:26,777 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 21:07:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:26,778 INFO L225 Difference]: With dead ends: 53 [2022-04-06 21:07:26,778 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 21:07:26,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5113, Invalid=6443, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 21:07:26,779 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:26,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 21:07:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 21:07:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-04-06 21:07:26,781 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2022-04-06 21:07:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:26,781 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-04-06 21:07:26,781 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:26,781 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-04-06 21:07:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 21:07:26,782 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:26,782 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:26,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 21:07:26,987 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 21:07:26,987 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1257543238, now seen corresponding path program 69 times [2022-04-06 21:07:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:26,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1667762066] [2022-04-06 21:07:26,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:26,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1257543238, now seen corresponding path program 70 times [2022-04-06 21:07:26,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:26,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515698486] [2022-04-06 21:07:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:26,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:27,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:27,548 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 21:07:27,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:27,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515698486] [2022-04-06 21:07:27,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515698486] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:27,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733952341] [2022-04-06 21:07:27,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:27,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:27,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:27,550 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 21:07:27,552 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 21:07:27,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:27,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:27,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 21:07:27,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:27,668 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 21:07:27,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:28,868 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 21:07:28,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733952341] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:28,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:28,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 75 [2022-04-06 21:07:28,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:28,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1667762066] [2022-04-06 21:07:28,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1667762066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:28,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:28,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:07:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740468058] [2022-04-06 21:07:28,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:28,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:07:28,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:28,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:07:28,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 21:07:28,871 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:29,436 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-04-06 21:07:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 21:07:29,436 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 21:07:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:29,437 INFO L225 Difference]: With dead ends: 54 [2022-04-06 21:07:29,437 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 21:07:29,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5403, Invalid=6807, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 21:07:29,438 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:29,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:29,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 21:07:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-06 21:07:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-04-06 21:07:29,441 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2022-04-06 21:07:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:29,441 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-04-06 21:07:29,441 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-04-06 21:07:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 21:07:29,442 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:29,442 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:29,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:29,647 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 21:07:29,647 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash 364523544, now seen corresponding path program 71 times [2022-04-06 21:07:29,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1676277488] [2022-04-06 21:07:29,648 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:29,648 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash 364523544, now seen corresponding path program 72 times [2022-04-06 21:07:29,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:29,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280262513] [2022-04-06 21:07:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:30,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:30,232 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 21:07:30,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280262513] [2022-04-06 21:07:30,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280262513] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:30,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775686524] [2022-04-06 21:07:30,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:30,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:30,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:30,236 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 21:07:30,265 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 21:07:30,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 21:07:30,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 21:07:30,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:30,376 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 21:07:30,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:31,675 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 21:07:31,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775686524] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:31,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:31,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 77 [2022-04-06 21:07:31,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:31,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1676277488] [2022-04-06 21:07:31,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1676277488] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:31,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:31,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 21:07:31,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114904287] [2022-04-06 21:07:31,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:31,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 21:07:31,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 21:07:31,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 21:07:31,679 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:32,291 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-04-06 21:07:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:07:32,292 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 21:07:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:32,292 INFO L225 Difference]: With dead ends: 55 [2022-04-06 21:07:32,292 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 21:07:32,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5701, Invalid=7181, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 21:07:32,293 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:32,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 21:07:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 21:07:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-04-06 21:07:32,296 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2022-04-06 21:07:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:32,296 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-04-06 21:07:32,296 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-04-06 21:07:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:07:32,297 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:32,297 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:32,313 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 21:07:32,499 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 21:07:32,499 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1549283194, now seen corresponding path program 73 times [2022-04-06 21:07:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:32,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [39367551] [2022-04-06 21:07:32,500 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:32,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1549283194, now seen corresponding path program 74 times [2022-04-06 21:07:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:32,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565558121] [2022-04-06 21:07:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:32,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:33,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:33,076 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 21:07:33,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565558121] [2022-04-06 21:07:33,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565558121] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329201752] [2022-04-06 21:07:33,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:33,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:33,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:33,078 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 21:07:33,078 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 21:07:33,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:33,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:33,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 21:07:33,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:33,206 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 21:07:33,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:34,669 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 21:07:34,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329201752] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:34,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:34,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 79 [2022-04-06 21:07:34,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:34,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [39367551] [2022-04-06 21:07:34,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [39367551] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:34,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:34,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:07:34,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250313724] [2022-04-06 21:07:34,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:34,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:07:34,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:07:34,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 21:07:34,672 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:35,292 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-04-06 21:07:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 21:07:35,292 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 21:07:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:35,293 INFO L225 Difference]: With dead ends: 56 [2022-04-06 21:07:35,293 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 21:07:35,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6007, Invalid=7565, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 21:07:35,294 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:35,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 21:07:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 21:07:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-04-06 21:07:35,297 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2022-04-06 21:07:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:35,297 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-04-06 21:07:35,298 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-04-06 21:07:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:07:35,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:35,298 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:35,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:35,503 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 21:07:35,503 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash -747749928, now seen corresponding path program 75 times [2022-04-06 21:07:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:35,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180227215] [2022-04-06 21:07:35,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:35,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:35,505 INFO L85 PathProgramCache]: Analyzing trace with hash -747749928, now seen corresponding path program 76 times [2022-04-06 21:07:35,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:35,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765159425] [2022-04-06 21:07:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:35,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:36,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:36,077 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 21:07:36,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:36,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765159425] [2022-04-06 21:07:36,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765159425] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:36,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812906849] [2022-04-06 21:07:36,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:36,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:36,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:36,078 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 21:07:36,079 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 21:07:36,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:36,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 21:07:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:36,201 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 21:07:36,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:37,618 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 21:07:37,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812906849] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:37,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:37,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 81 [2022-04-06 21:07:37,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:37,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180227215] [2022-04-06 21:07:37,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180227215] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:37,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:37,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 21:07:37,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776672151] [2022-04-06 21:07:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:37,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 21:07:37,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 21:07:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 21:07:37,620 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:38,288 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-04-06 21:07:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:07:38,288 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 21:07:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:38,289 INFO L225 Difference]: With dead ends: 57 [2022-04-06 21:07:38,289 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 21:07:38,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6321, Invalid=7959, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 21:07:38,290 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:38,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 21:07:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 21:07:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-04-06 21:07:38,293 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2022-04-06 21:07:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:38,293 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-04-06 21:07:38,293 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-04-06 21:07:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:07:38,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:38,294 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:38,319 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 21:07:38,515 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 21:07:38,516 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1670022458, now seen corresponding path program 77 times [2022-04-06 21:07:38,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:38,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574699969] [2022-04-06 21:07:38,517 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:38,517 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:38,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1670022458, now seen corresponding path program 78 times [2022-04-06 21:07:38,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:38,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416335140] [2022-04-06 21:07:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:38,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:39,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:39,112 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 21:07:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:39,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416335140] [2022-04-06 21:07:39,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416335140] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:39,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358012688] [2022-04-06 21:07:39,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:39,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:39,115 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 21:07:39,142 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 21:07:39,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-04-06 21:07:39,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:39,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 21:07:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:39,265 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 21:07:39,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:40,758 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 21:07:40,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358012688] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:40,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:40,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 83 [2022-04-06 21:07:40,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:40,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574699969] [2022-04-06 21:07:40,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574699969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:40,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:40,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:07:40,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634046128] [2022-04-06 21:07:40,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:40,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:07:40,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:40,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:07:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 21:07:40,760 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:41,445 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-04-06 21:07:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 21:07:41,445 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 21:07:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:41,446 INFO L225 Difference]: With dead ends: 58 [2022-04-06 21:07:41,446 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 21:07:41,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6643, Invalid=8363, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 21:07:41,448 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:41,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 21:07:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-06 21:07:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-04-06 21:07:41,450 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2022-04-06 21:07:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:41,451 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-04-06 21:07:41,451 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-04-06 21:07:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:07:41,451 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:41,451 INFO L499 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:41,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:41,659 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 21:07:41,659 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:41,660 INFO L85 PathProgramCache]: Analyzing trace with hash -195699816, now seen corresponding path program 79 times [2022-04-06 21:07:41,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:41,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [424395788] [2022-04-06 21:07:41,660 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:41,660 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:41,660 INFO L85 PathProgramCache]: Analyzing trace with hash -195699816, now seen corresponding path program 80 times [2022-04-06 21:07:41,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:41,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998973334] [2022-04-06 21:07:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:41,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:42,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:42,238 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 21:07:42,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:42,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998973334] [2022-04-06 21:07:42,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998973334] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:42,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501719117] [2022-04-06 21:07:42,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:42,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:42,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:42,239 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 21:07:42,241 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 21:07:42,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:42,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:42,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 21:07:42,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:42,369 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 21:07:42,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:43,951 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 21:07:43,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501719117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:43,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:43,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 85 [2022-04-06 21:07:43,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:43,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [424395788] [2022-04-06 21:07:43,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [424395788] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:43,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:43,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 21:07:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331896479] [2022-04-06 21:07:43,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:43,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 21:07:43,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 21:07:43,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 21:07:43,954 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:44,636 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-04-06 21:07:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:07:44,636 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 21:07:44,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:44,637 INFO L225 Difference]: With dead ends: 59 [2022-04-06 21:07:44,637 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 21:07:44,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6973, Invalid=8777, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 21:07:44,639 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:44,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 21:07:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 21:07:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-04-06 21:07:44,641 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2022-04-06 21:07:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:44,641 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-04-06 21:07:44,641 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-04-06 21:07:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:07:44,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:44,641 INFO L499 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:44,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 21:07:44,842 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 21:07:44,842 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:44,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:44,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1736338170, now seen corresponding path program 81 times [2022-04-06 21:07:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:44,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [21290277] [2022-04-06 21:07:44,843 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:44,844 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1736338170, now seen corresponding path program 82 times [2022-04-06 21:07:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:44,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576714877] [2022-04-06 21:07:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:45,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:45,478 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 21:07:45,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:45,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576714877] [2022-04-06 21:07:45,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576714877] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:45,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346311178] [2022-04-06 21:07:45,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:45,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:45,479 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 21:07:45,480 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 21:07:45,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:45,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 21:07:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:45,602 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 21:07:45,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:47,248 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 21:07:47,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346311178] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:47,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:47,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 87 [2022-04-06 21:07:47,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:47,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [21290277] [2022-04-06 21:07:47,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [21290277] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:47,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:47,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 21:07:47,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125035400] [2022-04-06 21:07:47,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:47,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 21:07:47,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 21:07:47,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 21:07:47,250 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:47,973 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-04-06 21:07:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 21:07:47,973 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 21:07:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:47,974 INFO L225 Difference]: With dead ends: 60 [2022-04-06 21:07:47,974 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 21:07:47,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7311, Invalid=9201, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 21:07:47,976 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:47,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:07:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 21:07:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 21:07:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-04-06 21:07:47,979 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2022-04-06 21:07:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:47,979 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-04-06 21:07:47,979 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-04-06 21:07:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 21:07:47,979 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:47,979 INFO L499 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:47,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 21:07:48,187 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 21:07:48,187 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2043480408, now seen corresponding path program 83 times [2022-04-06 21:07:48,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:48,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86306462] [2022-04-06 21:07:48,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:48,189 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2043480408, now seen corresponding path program 84 times [2022-04-06 21:07:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:48,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969374010] [2022-04-06 21:07:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:48,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:48,897 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 21:07:48,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:48,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969374010] [2022-04-06 21:07:48,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969374010] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:48,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997997950] [2022-04-06 21:07:48,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:48,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:48,898 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 21:07:48,899 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 21:07:48,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 21:07:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 21:07:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:49,027 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 21:07:49,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:50,712 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 21:07:50,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997997950] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:50,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:50,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 89 [2022-04-06 21:07:50,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:50,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86306462] [2022-04-06 21:07:50,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86306462] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:50,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:50,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 21:07:50,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717921715] [2022-04-06 21:07:50,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:50,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 21:07:50,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:50,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 21:07:50,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 21:07:50,715 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:51,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:51,486 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-04-06 21:07:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:07:51,487 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 21:07:51,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:51,487 INFO L225 Difference]: With dead ends: 61 [2022-04-06 21:07:51,487 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 21:07:51,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7657, Invalid=9635, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 21:07:51,489 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:51,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 21:07:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 21:07:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-04-06 21:07:51,492 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2022-04-06 21:07:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:51,492 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-04-06 21:07:51,492 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-04-06 21:07:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 21:07:51,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:51,492 INFO L499 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:51,510 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 21:07:51,695 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 21:07:51,695 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1041227962, now seen corresponding path program 85 times [2022-04-06 21:07:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098360502] [2022-04-06 21:07:51,697 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:51,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1041227962, now seen corresponding path program 86 times [2022-04-06 21:07:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:51,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760888938] [2022-04-06 21:07:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:51,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:52,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:52,383 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 21:07:52,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:52,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760888938] [2022-04-06 21:07:52,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760888938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:52,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011610731] [2022-04-06 21:07:52,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:07:52,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:52,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:52,385 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 21:07:52,385 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 21:07:52,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:07:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 21:07:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:52,515 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 21:07:52,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:54,308 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 21:07:54,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011610731] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:54,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:54,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 91 [2022-04-06 21:07:54,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:54,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098360502] [2022-04-06 21:07:54,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098360502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:54,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:54,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 21:07:54,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944749363] [2022-04-06 21:07:54,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:54,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 21:07:54,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 21:07:54,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 21:07:54,310 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:55,167 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-04-06 21:07:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 21:07:55,167 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 21:07:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:55,167 INFO L225 Difference]: With dead ends: 62 [2022-04-06 21:07:55,167 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 21:07:55,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8011, Invalid=10079, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 21:07:55,170 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:55,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 21:07:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-06 21:07:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-04-06 21:07:55,173 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2022-04-06 21:07:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:55,173 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-04-06 21:07:55,173 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-04-06 21:07:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 21:07:55,174 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:55,174 INFO L499 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:55,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 21:07:55,383 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 21:07:55,383 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:55,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2117060376, now seen corresponding path program 87 times [2022-04-06 21:07:55,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629044933] [2022-04-06 21:07:55,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:55,385 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2117060376, now seen corresponding path program 88 times [2022-04-06 21:07:55,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:55,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488712165] [2022-04-06 21:07:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:55,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:56,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:56,168 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 21:07:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488712165] [2022-04-06 21:07:56,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488712165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:56,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065264876] [2022-04-06 21:07:56,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:07:56,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:56,170 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 21:07:56,171 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 21:07:56,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:07:56,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 21:07:56,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:07:56,315 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 21:07:56,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:07:58,188 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 21:07:58,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065264876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:07:58,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:07:58,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 93 [2022-04-06 21:07:58,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:07:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629044933] [2022-04-06 21:07:58,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629044933] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:07:58,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:07:58,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 21:07:58,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103222738] [2022-04-06 21:07:58,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:07:58,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 21:07:58,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 21:07:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 21:07:58,190 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:07:59,043 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-04-06 21:07:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:07:59,043 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 21:07:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:07:59,044 INFO L225 Difference]: With dead ends: 63 [2022-04-06 21:07:59,044 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 21:07:59,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8373, Invalid=10533, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 21:07:59,046 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:07:59,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:07:59,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 21:07:59,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 21:07:59,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-04-06 21:07:59,049 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2022-04-06 21:07:59,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:07:59,050 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-04-06 21:07:59,050 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:07:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-04-06 21:07:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:07:59,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:07:59,050 INFO L499 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:07:59,072 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 21:07:59,267 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 21:07:59,267 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:07:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:07:59,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1239751046, now seen corresponding path program 89 times [2022-04-06 21:07:59,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:07:59,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1720675473] [2022-04-06 21:07:59,269 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:59,269 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1239751046, now seen corresponding path program 90 times [2022-04-06 21:07:59,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:59,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755789168] [2022-04-06 21:07:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:59,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:00,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:00,036 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 21:08:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755789168] [2022-04-06 21:08:00,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755789168] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:00,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053128719] [2022-04-06 21:08:00,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:08:00,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:00,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:00,038 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 21:08:00,038 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 21:08:00,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-04-06 21:08:00,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 21:08:00,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:00,203 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 21:08:00,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:02,218 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 21:08:02,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053128719] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:02,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:02,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 95 [2022-04-06 21:08:02,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:02,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1720675473] [2022-04-06 21:08:02,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1720675473] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:02,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:02,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 21:08:02,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550811642] [2022-04-06 21:08:02,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:02,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 21:08:02,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:02,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 21:08:02,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 21:08:02,220 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:03,079 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-04-06 21:08:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 21:08:03,079 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 21:08:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:03,079 INFO L225 Difference]: With dead ends: 64 [2022-04-06 21:08:03,085 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 21:08:03,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8743, Invalid=10997, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 21:08:03,086 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:03,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 21:08:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-04-06 21:08:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-04-06 21:08:03,089 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2022-04-06 21:08:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:03,089 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-04-06 21:08:03,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-04-06 21:08:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 21:08:03,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:03,090 INFO L499 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:03,106 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 21:08:03,295 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 21:08:03,295 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:03,296 INFO L85 PathProgramCache]: Analyzing trace with hash -187034408, now seen corresponding path program 91 times [2022-04-06 21:08:03,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:03,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472681666] [2022-04-06 21:08:03,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:03,296 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -187034408, now seen corresponding path program 92 times [2022-04-06 21:08:03,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:03,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693142189] [2022-04-06 21:08:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:03,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:04,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:04,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:04,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693142189] [2022-04-06 21:08:04,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693142189] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:04,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936505433] [2022-04-06 21:08:04,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:08:04,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:04,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:04,127 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 21:08:04,152 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 21:08:04,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:08:04,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:04,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 21:08:04,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:04,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:06,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936505433] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:06,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:06,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 97 [2022-04-06 21:08:06,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:06,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472681666] [2022-04-06 21:08:06,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472681666] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:06,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:06,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 21:08:06,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782229819] [2022-04-06 21:08:06,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:06,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 21:08:06,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:06,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 21:08:06,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 21:08:06,336 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:07,270 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-04-06 21:08:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 21:08:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 21:08:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:07,270 INFO L225 Difference]: With dead ends: 65 [2022-04-06 21:08:07,270 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 21:08:07,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9121, Invalid=11471, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 21:08:07,272 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:07,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 21:08:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-06 21:08:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-04-06 21:08:07,275 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2022-04-06 21:08:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:07,275 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-04-06 21:08:07,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-04-06 21:08:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:08:07,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:07,275 INFO L499 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:07,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:07,489 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 21:08:07,490 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1467710522, now seen corresponding path program 93 times [2022-04-06 21:08:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:07,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1160483134] [2022-04-06 21:08:07,491 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:07,491 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1467710522, now seen corresponding path program 94 times [2022-04-06 21:08:07,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:07,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805724401] [2022-04-06 21:08:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:08,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:08,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:08,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805724401] [2022-04-06 21:08:08,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805724401] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:08,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44651335] [2022-04-06 21:08:08,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:08:08,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:08,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:08,383 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 21:08:08,384 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 21:08:08,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:08:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 21:08:08,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:08,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:10,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44651335] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:10,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:10,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 99 [2022-04-06 21:08:10,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1160483134] [2022-04-06 21:08:10,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1160483134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:10,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:10,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 21:08:10,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067303904] [2022-04-06 21:08:10,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:10,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 21:08:10,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:10,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 21:08:10,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 21:08:10,631 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:11,579 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-04-06 21:08:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 21:08:11,579 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 21:08:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:11,580 INFO L225 Difference]: With dead ends: 66 [2022-04-06 21:08:11,580 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 21:08:11,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9507, Invalid=11955, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 21:08:11,582 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:11,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 21:08:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-06 21:08:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-04-06 21:08:11,585 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2022-04-06 21:08:11,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:11,586 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-04-06 21:08:11,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-04-06 21:08:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 21:08:11,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:11,586 INFO L499 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:11,605 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 21:08:11,799 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 21:08:11,799 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1781002904, now seen corresponding path program 95 times [2022-04-06 21:08:11,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:11,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [751103980] [2022-04-06 21:08:11,801 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:11,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:11,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1781002904, now seen corresponding path program 96 times [2022-04-06 21:08:11,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:11,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062030018] [2022-04-06 21:08:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:11,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:12,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:12,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:12,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062030018] [2022-04-06 21:08:12,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062030018] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:12,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267680763] [2022-04-06 21:08:12,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:08:12,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:12,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:12,627 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 21:08:12,630 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 21:08:12,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 21:08:12,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:12,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 21:08:12,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:12,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:14,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267680763] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:14,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:14,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 101 [2022-04-06 21:08:14,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [751103980] [2022-04-06 21:08:14,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [751103980] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:14,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:14,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 21:08:14,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368072161] [2022-04-06 21:08:14,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:14,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 21:08:14,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 21:08:14,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 21:08:14,936 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:15,919 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-04-06 21:08:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 21:08:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 21:08:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:15,920 INFO L225 Difference]: With dead ends: 67 [2022-04-06 21:08:15,920 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 21:08:15,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9901, Invalid=12449, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 21:08:15,922 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:15,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 21:08:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-04-06 21:08:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-04-06 21:08:15,930 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2022-04-06 21:08:15,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:15,930 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-04-06 21:08:15,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-04-06 21:08:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 21:08:15,930 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:15,931 INFO L499 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:15,949 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 21:08:16,143 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 21:08:16,143 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash -588095994, now seen corresponding path program 97 times [2022-04-06 21:08:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:16,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1001365941] [2022-04-06 21:08:16,145 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:16,145 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:16,145 INFO L85 PathProgramCache]: Analyzing trace with hash -588095994, now seen corresponding path program 98 times [2022-04-06 21:08:16,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:16,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733064967] [2022-04-06 21:08:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:16,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:16,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:16,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733064967] [2022-04-06 21:08:16,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733064967] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070384592] [2022-04-06 21:08:16,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:08:16,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:16,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:16,986 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 21:08:16,987 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 21:08:17,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:08:17,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:08:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:17,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:19,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070384592] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:19,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:19,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 103 [2022-04-06 21:08:19,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1001365941] [2022-04-06 21:08:19,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1001365941] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:19,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:19,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 21:08:19,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060782966] [2022-04-06 21:08:19,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:19,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 21:08:19,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 21:08:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:08:19,398 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:20,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:20,391 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-04-06 21:08:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 21:08:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 21:08:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:20,392 INFO L225 Difference]: With dead ends: 68 [2022-04-06 21:08:20,392 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 21:08:20,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10303, Invalid=12953, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 21:08:20,393 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:20,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 21:08:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-04-06 21:08:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-04-06 21:08:20,396 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2022-04-06 21:08:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:20,397 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-04-06 21:08:20,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-04-06 21:08:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 21:08:20,397 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:20,397 INFO L499 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:20,416 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 21:08:20,607 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 21:08:20,607 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1015717800, now seen corresponding path program 99 times [2022-04-06 21:08:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:20,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1875125674] [2022-04-06 21:08:20,609 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:20,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:20,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1015717800, now seen corresponding path program 100 times [2022-04-06 21:08:20,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:20,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932931627] [2022-04-06 21:08:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:20,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:21,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:21,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932931627] [2022-04-06 21:08:21,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932931627] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188107515] [2022-04-06 21:08:21,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:08:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:21,511 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 21:08:21,512 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 21:08:21,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:08:21,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 21:08:21,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:21,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:23,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188107515] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:23,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:23,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 103 [2022-04-06 21:08:23,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:23,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1875125674] [2022-04-06 21:08:23,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1875125674] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:23,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:23,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 21:08:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874516060] [2022-04-06 21:08:23,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:23,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 21:08:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:23,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 21:08:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:08:23,941 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:25,077 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-04-06 21:08:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 21:08:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 21:08:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:25,078 INFO L225 Difference]: With dead ends: 69 [2022-04-06 21:08:25,078 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 21:08:25,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 21:08:25,079 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:25,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:25,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 21:08:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-06 21:08:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-04-06 21:08:25,082 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2022-04-06 21:08:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:25,083 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-04-06 21:08:25,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-04-06 21:08:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:08:25,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:25,083 INFO L499 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:25,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:25,299 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 21:08:25,299 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:25,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1387091898, now seen corresponding path program 101 times [2022-04-06 21:08:25,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:25,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [238556852] [2022-04-06 21:08:25,300 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:25,300 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1387091898, now seen corresponding path program 102 times [2022-04-06 21:08:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:25,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015978500] [2022-04-06 21:08:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:25,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:26,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:26,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:26,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015978500] [2022-04-06 21:08:26,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015978500] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:26,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166339472] [2022-04-06 21:08:26,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:08:26,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:26,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:26,301 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 21:08:26,301 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 21:08:26,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-04-06 21:08:26,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 21:08:26,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:26,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:28,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166339472] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:28,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:28,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 103 [2022-04-06 21:08:28,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:28,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [238556852] [2022-04-06 21:08:28,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [238556852] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:28,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:28,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 21:08:28,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250176900] [2022-04-06 21:08:28,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:28,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 21:08:28,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 21:08:28,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:08:28,712 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:29,777 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-04-06 21:08:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 21:08:29,777 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 21:08:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:29,778 INFO L225 Difference]: With dead ends: 70 [2022-04-06 21:08:29,778 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 21:08:29,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10509, Invalid=13361, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 21:08:29,780 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:29,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 21:08:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-04-06 21:08:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-04-06 21:08:29,784 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2022-04-06 21:08:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:29,784 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-04-06 21:08:29,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-04-06 21:08:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 21:08:29,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:29,784 INFO L499 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:29,801 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 21:08:29,987 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 21:08:29,988 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:29,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash -14787048, now seen corresponding path program 103 times [2022-04-06 21:08:29,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:29,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744087506] [2022-04-06 21:08:29,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:29,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash -14787048, now seen corresponding path program 104 times [2022-04-06 21:08:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828652984] [2022-04-06 21:08:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:29,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:30,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:30,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828652984] [2022-04-06 21:08:30,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828652984] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552329061] [2022-04-06 21:08:30,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:08:30,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:30,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:30,914 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 21:08:30,915 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 21:08:30,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:08:30,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:30,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 21:08:30,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:31,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:33,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552329061] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:33,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:33,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 103 [2022-04-06 21:08:33,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:33,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744087506] [2022-04-06 21:08:33,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744087506] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:33,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:33,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 21:08:33,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463168293] [2022-04-06 21:08:33,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:33,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 21:08:33,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:33,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 21:08:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:08:33,322 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:34,431 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-04-06 21:08:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 21:08:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 21:08:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:34,432 INFO L225 Difference]: With dead ends: 71 [2022-04-06 21:08:34,432 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 21:08:34,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10612, Invalid=13568, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 21:08:34,434 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:34,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 21:08:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-04-06 21:08:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-04-06 21:08:34,437 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2022-04-06 21:08:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:34,437 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-04-06 21:08:34,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-04-06 21:08:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 21:08:34,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:34,437 INFO L499 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:34,452 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 21:08:34,637 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 21:08:34,638 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash -423009658, now seen corresponding path program 105 times [2022-04-06 21:08:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:34,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [937139216] [2022-04-06 21:08:34,639 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:34,639 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash -423009658, now seen corresponding path program 106 times [2022-04-06 21:08:34,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:34,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236375398] [2022-04-06 21:08:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:34,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:35,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:35,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:35,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236375398] [2022-04-06 21:08:35,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236375398] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:35,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606126436] [2022-04-06 21:08:35,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:08:35,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:35,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:35,593 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 21:08:35,594 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 21:08:35,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:08:35,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:35,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:08:35,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:35,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:37,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606126436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:37,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:37,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 103 [2022-04-06 21:08:37,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:37,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [937139216] [2022-04-06 21:08:37,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [937139216] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:37,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:37,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 21:08:37,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704870128] [2022-04-06 21:08:37,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:37,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 21:08:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:37,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 21:08:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:08:37,940 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:39,088 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-04-06 21:08:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 21:08:39,088 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 21:08:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:39,089 INFO L225 Difference]: With dead ends: 72 [2022-04-06 21:08:39,089 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 21:08:39,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10715, Invalid=13777, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 21:08:39,092 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:39,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 21:08:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-06 21:08:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-04-06 21:08:39,095 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2022-04-06 21:08:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:39,095 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-04-06 21:08:39,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-04-06 21:08:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 21:08:39,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:39,096 INFO L499 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:39,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 21:08:39,307 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 21:08:39,307 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash -193008680, now seen corresponding path program 107 times [2022-04-06 21:08:39,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:39,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [681332232] [2022-04-06 21:08:39,308 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:39,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:39,309 INFO L85 PathProgramCache]: Analyzing trace with hash -193008680, now seen corresponding path program 108 times [2022-04-06 21:08:39,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:39,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616501308] [2022-04-06 21:08:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:39,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:40,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:40,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:40,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616501308] [2022-04-06 21:08:40,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616501308] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:40,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689913853] [2022-04-06 21:08:40,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:08:40,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:40,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:40,273 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 21:08:40,274 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 21:08:40,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 21:08:40,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:40,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 21:08:40,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:40,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:42,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689913853] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:42,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:42,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 103 [2022-04-06 21:08:42,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [681332232] [2022-04-06 21:08:42,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [681332232] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:42,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:42,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 21:08:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228735438] [2022-04-06 21:08:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:42,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 21:08:42,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 21:08:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:08:42,583 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:43,758 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-04-06 21:08:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 21:08:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 21:08:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:43,758 INFO L225 Difference]: With dead ends: 73 [2022-04-06 21:08:43,758 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 21:08:43,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10818, Invalid=13988, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 21:08:43,760 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:43,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 21:08:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-04-06 21:08:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-04-06 21:08:43,763 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2022-04-06 21:08:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:43,763 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-04-06 21:08:43,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-04-06 21:08:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 21:08:43,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:43,764 INFO L499 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:43,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 21:08:43,971 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 21:08:43,971 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:43,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1652912954, now seen corresponding path program 109 times [2022-04-06 21:08:43,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:43,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1121778101] [2022-04-06 21:08:43,972 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:43,972 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:43,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1652912954, now seen corresponding path program 110 times [2022-04-06 21:08:43,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:43,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39884388] [2022-04-06 21:08:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:43,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:45,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:45,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:45,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39884388] [2022-04-06 21:08:45,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39884388] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:45,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901706198] [2022-04-06 21:08:45,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:08:45,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:45,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:45,015 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 21:08:45,017 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 21:08:45,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:08:45,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:45,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 21:08:45,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:45,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:47,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901706198] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:47,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:47,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 103 [2022-04-06 21:08:47,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:47,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1121778101] [2022-04-06 21:08:47,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1121778101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:47,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:47,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 21:08:47,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214331113] [2022-04-06 21:08:47,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:47,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 21:08:47,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 21:08:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:08:47,279 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:48,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:48,525 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-04-06 21:08:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 21:08:48,525 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 21:08:48,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:48,526 INFO L225 Difference]: With dead ends: 74 [2022-04-06 21:08:48,526 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 21:08:48,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10921, Invalid=14201, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 21:08:48,528 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:48,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:48,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 21:08:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-04-06 21:08:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-04-06 21:08:48,531 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2022-04-06 21:08:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:48,531 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-04-06 21:08:48,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-04-06 21:08:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:08:48,532 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:48,532 INFO L499 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:48,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:48,739 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 21:08:48,739 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash 334694808, now seen corresponding path program 111 times [2022-04-06 21:08:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:48,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529517658] [2022-04-06 21:08:48,740 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:48,740 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:48,741 INFO L85 PathProgramCache]: Analyzing trace with hash 334694808, now seen corresponding path program 112 times [2022-04-06 21:08:48,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:48,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038336244] [2022-04-06 21:08:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:49,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:49,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:49,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038336244] [2022-04-06 21:08:49,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038336244] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:49,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631530263] [2022-04-06 21:08:49,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:08:49,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:49,762 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 21:08:49,762 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 21:08:49,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:08:49,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 21:08:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:49,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:52,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631530263] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:52,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:52,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 103 [2022-04-06 21:08:52,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:52,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529517658] [2022-04-06 21:08:52,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529517658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:52,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:52,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 21:08:52,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603087368] [2022-04-06 21:08:52,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:52,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 21:08:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:52,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 21:08:52,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:08:52,027 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:53,292 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-04-06 21:08:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 21:08:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 21:08:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:53,293 INFO L225 Difference]: With dead ends: 75 [2022-04-06 21:08:53,293 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 21:08:53,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11024, Invalid=14416, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 21:08:53,294 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:53,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 21:08:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 21:08:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-04-06 21:08:53,298 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2022-04-06 21:08:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:53,298 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-04-06 21:08:53,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-04-06 21:08:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 21:08:53,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:53,298 INFO L499 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:53,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:53,503 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 21:08:53,503 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:53,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1820993286, now seen corresponding path program 113 times [2022-04-06 21:08:53,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:53,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1819431284] [2022-04-06 21:08:53,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:53,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1820993286, now seen corresponding path program 114 times [2022-04-06 21:08:53,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:53,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860998612] [2022-04-06 21:08:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:53,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:54,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:54,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860998612] [2022-04-06 21:08:54,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860998612] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:54,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447727488] [2022-04-06 21:08:54,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:08:54,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:54,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:54,576 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 21:08:54,577 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 21:08:54,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-04-06 21:08:54,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:08:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:54,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:56,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447727488] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:56,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:56,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 103 [2022-04-06 21:08:56,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1819431284] [2022-04-06 21:08:56,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1819431284] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:56,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:56,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 21:08:56,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268745503] [2022-04-06 21:08:56,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:56,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 21:08:56,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 21:08:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:08:56,806 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:58,111 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-04-06 21:08:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 21:08:58,111 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 21:08:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:58,112 INFO L225 Difference]: With dead ends: 76 [2022-04-06 21:08:58,112 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 21:08:58,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11127, Invalid=14633, Unknown=0, NotChecked=0, Total=25760 [2022-04-06 21:08:58,114 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:58,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 21:08:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 21:08:58,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-04-06 21:08:58,117 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2022-04-06 21:08:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:58,117 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-04-06 21:08:58,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-04-06 21:08:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 21:08:58,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:58,118 INFO L499 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:58,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 21:08:58,318 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 21:08:58,318 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash 651605848, now seen corresponding path program 115 times [2022-04-06 21:08:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:58,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354180909] [2022-04-06 21:08:58,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:58,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:58,319 INFO L85 PathProgramCache]: Analyzing trace with hash 651605848, now seen corresponding path program 116 times [2022-04-06 21:08:58,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:58,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118369950] [2022-04-06 21:08:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:58,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:59,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:08:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:08:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:59,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:08:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118369950] [2022-04-06 21:08:59,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118369950] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:08:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125923751] [2022-04-06 21:08:59,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:08:59,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:08:59,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:08:59,454 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 21:08:59,454 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 21:08:59,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:08:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:08:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 21:08:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:08:59,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:01,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125923751] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:01,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:01,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 103 [2022-04-06 21:09:01,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:01,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354180909] [2022-04-06 21:09:01,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354180909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:01,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:01,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 21:09:01,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346314149] [2022-04-06 21:09:01,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:01,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 21:09:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:01,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 21:09:01,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:01,664 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:02,996 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2022-04-06 21:09:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 21:09:02,996 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-04-06 21:09:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:02,997 INFO L225 Difference]: With dead ends: 77 [2022-04-06 21:09:02,997 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 21:09:02,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11230, Invalid=14852, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 21:09:02,999 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:02,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 21:09:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-04-06 21:09:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-04-06 21:09:03,001 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2022-04-06 21:09:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:03,002 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-04-06 21:09:03,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-04-06 21:09:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 21:09:03,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:03,002 INFO L499 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:03,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:03,222 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 21:09:03,222 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1239666362, now seen corresponding path program 117 times [2022-04-06 21:09:03,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:03,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [384168089] [2022-04-06 21:09:03,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:03,223 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:03,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1239666362, now seen corresponding path program 118 times [2022-04-06 21:09:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:03,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209077295] [2022-04-06 21:09:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:03,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:04,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:04,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209077295] [2022-04-06 21:09:04,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209077295] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461072783] [2022-04-06 21:09:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:09:04,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:04,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:04,431 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 21:09:04,432 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 21:09:04,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:09:04,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 21:09:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:04,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:06,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461072783] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:06,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:06,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 103 [2022-04-06 21:09:06,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:06,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [384168089] [2022-04-06 21:09:06,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [384168089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:06,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:06,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 21:09:06,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255706508] [2022-04-06 21:09:06,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:06,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 21:09:06,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:06,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 21:09:06,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:06,601 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:08,088 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-04-06 21:09:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 21:09:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 21:09:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:08,089 INFO L225 Difference]: With dead ends: 78 [2022-04-06 21:09:08,089 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 21:09:08,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11333, Invalid=15073, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 21:09:08,091 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:08,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 21:09:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-06 21:09:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-04-06 21:09:08,094 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2022-04-06 21:09:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:08,094 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-04-06 21:09:08,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-04-06 21:09:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 21:09:08,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:08,095 INFO L499 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:08,118 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 21:09:08,317 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 21:09:08,317 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:08,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:08,318 INFO L85 PathProgramCache]: Analyzing trace with hash 260437272, now seen corresponding path program 119 times [2022-04-06 21:09:08,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:08,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1029936485] [2022-04-06 21:09:08,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:08,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash 260437272, now seen corresponding path program 120 times [2022-04-06 21:09:08,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:08,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055304393] [2022-04-06 21:09:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:08,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:09,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:09,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:09,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055304393] [2022-04-06 21:09:09,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055304393] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:09,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095009286] [2022-04-06 21:09:09,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:09:09,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:09,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:09,529 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 21:09:09,530 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 21:09:09,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-04-06 21:09:09,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:09,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 21:09:09,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:09,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:11,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095009286] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:11,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:11,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 103 [2022-04-06 21:09:11,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:11,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1029936485] [2022-04-06 21:09:11,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1029936485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:11,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:11,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 21:09:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21877517] [2022-04-06 21:09:11,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:11,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 21:09:11,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 21:09:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:11,695 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:13,130 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-04-06 21:09:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 21:09:13,130 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-04-06 21:09:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:13,130 INFO L225 Difference]: With dead ends: 79 [2022-04-06 21:09:13,130 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 21:09:13,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11436, Invalid=15296, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 21:09:13,132 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:13,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 21:09:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 21:09:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-04-06 21:09:13,135 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2022-04-06 21:09:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:13,135 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-04-06 21:09:13,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-04-06 21:09:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 21:09:13,136 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:13,136 INFO L499 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:13,158 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 21:09:13,357 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 21:09:13,358 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash -480990330, now seen corresponding path program 121 times [2022-04-06 21:09:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:13,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [259421691] [2022-04-06 21:09:13,359 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:13,359 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash -480990330, now seen corresponding path program 122 times [2022-04-06 21:09:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:13,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485202814] [2022-04-06 21:09:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:13,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:14,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:14,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:14,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485202814] [2022-04-06 21:09:14,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485202814] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:14,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980418935] [2022-04-06 21:09:14,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:09:14,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:14,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:14,585 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 21:09:14,586 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 21:09:14,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:09:14,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:14,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:09:14,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:14,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:16,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980418935] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:16,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:16,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 103 [2022-04-06 21:09:16,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:16,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [259421691] [2022-04-06 21:09:16,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [259421691] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:16,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:16,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 21:09:16,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113895860] [2022-04-06 21:09:16,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:16,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 21:09:16,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:16,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 21:09:16,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:16,698 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:18,210 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-04-06 21:09:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 21:09:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 21:09:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:18,211 INFO L225 Difference]: With dead ends: 80 [2022-04-06 21:09:18,211 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 21:09:18,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11539, Invalid=15521, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 21:09:18,213 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:18,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 64 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 21:09:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-04-06 21:09:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-04-06 21:09:18,216 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2022-04-06 21:09:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:18,216 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-04-06 21:09:18,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-04-06 21:09:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 21:09:18,217 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:18,217 INFO L499 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:18,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:18,435 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 21:09:18,435 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1990409512, now seen corresponding path program 123 times [2022-04-06 21:09:18,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:18,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019745674] [2022-04-06 21:09:18,436 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:18,437 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1990409512, now seen corresponding path program 124 times [2022-04-06 21:09:18,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:18,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30859057] [2022-04-06 21:09:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:19,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:19,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30859057] [2022-04-06 21:09:19,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30859057] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288081983] [2022-04-06 21:09:19,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:09:19,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:19,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:19,695 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 21:09:19,696 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 21:09:19,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:09:19,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:19,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 21:09:19,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:19,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:21,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288081983] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:21,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:21,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 103 [2022-04-06 21:09:21,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:21,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019745674] [2022-04-06 21:09:21,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019745674] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:21,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:21,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 21:09:21,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60957220] [2022-04-06 21:09:21,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:21,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 21:09:21,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:21,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 21:09:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:21,802 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:23,379 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2022-04-06 21:09:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 21:09:23,379 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-04-06 21:09:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:23,379 INFO L225 Difference]: With dead ends: 81 [2022-04-06 21:09:23,380 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 21:09:23,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11642, Invalid=15748, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 21:09:23,382 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:23,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:23,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 21:09:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-04-06 21:09:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-04-06 21:09:23,385 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2022-04-06 21:09:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:23,385 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-04-06 21:09:23,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-04-06 21:09:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 21:09:23,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:23,386 INFO L499 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:23,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:23,591 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 21:09:23,591 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1537763898, now seen corresponding path program 125 times [2022-04-06 21:09:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:23,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [766500889] [2022-04-06 21:09:23,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:23,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:23,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1537763898, now seen corresponding path program 126 times [2022-04-06 21:09:23,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:23,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172217954] [2022-04-06 21:09:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:23,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:24,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:24,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:24,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172217954] [2022-04-06 21:09:24,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172217954] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:24,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802342043] [2022-04-06 21:09:24,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:09:24,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:24,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:24,920 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 21:09:24,921 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 21:09:24,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-04-06 21:09:24,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:24,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 21:09:24,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:25,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:27,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802342043] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:27,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:27,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 103 [2022-04-06 21:09:27,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [766500889] [2022-04-06 21:09:27,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [766500889] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:27,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:27,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 21:09:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694821132] [2022-04-06 21:09:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:27,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 21:09:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 21:09:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:27,003 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:28,551 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-04-06 21:09:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 21:09:28,552 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 21:09:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:28,553 INFO L225 Difference]: With dead ends: 82 [2022-04-06 21:09:28,553 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 21:09:28,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11745, Invalid=15977, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 21:09:28,555 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:28,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 21:09:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-04-06 21:09:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-04-06 21:09:28,562 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2022-04-06 21:09:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:28,563 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-04-06 21:09:28,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-04-06 21:09:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 21:09:28,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:28,563 INFO L499 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:28,588 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 21:09:28,785 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 21:09:28,786 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash -390651752, now seen corresponding path program 127 times [2022-04-06 21:09:28,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:28,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [191377560] [2022-04-06 21:09:28,787 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:28,787 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash -390651752, now seen corresponding path program 128 times [2022-04-06 21:09:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:28,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515908407] [2022-04-06 21:09:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:28,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:30,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:30,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:30,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515908407] [2022-04-06 21:09:30,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515908407] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:30,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827324253] [2022-04-06 21:09:30,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:09:30,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:30,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:30,118 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 21:09:30,118 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 21:09:30,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:09:30,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:30,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 21:09:30,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:30,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:32,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827324253] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:32,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:32,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 103 [2022-04-06 21:09:32,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:32,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [191377560] [2022-04-06 21:09:32,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [191377560] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:32,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:32,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 21:09:32,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681495777] [2022-04-06 21:09:32,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:32,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 21:09:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 21:09:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:32,132 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:33,712 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2022-04-06 21:09:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 21:09:33,713 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-04-06 21:09:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:33,713 INFO L225 Difference]: With dead ends: 83 [2022-04-06 21:09:33,713 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 21:09:33,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11848, Invalid=16208, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 21:09:33,716 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:33,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 21:09:33,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-04-06 21:09:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-04-06 21:09:33,719 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2022-04-06 21:09:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:33,719 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-04-06 21:09:33,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-04-06 21:09:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 21:09:33,720 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:33,720 INFO L499 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:33,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:33,927 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 21:09:33,927 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:33,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 810086406, now seen corresponding path program 129 times [2022-04-06 21:09:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:33,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [121717080] [2022-04-06 21:09:33,928 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:33,928 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 810086406, now seen corresponding path program 130 times [2022-04-06 21:09:33,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:33,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161657479] [2022-04-06 21:09:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:33,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:35,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:35,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161657479] [2022-04-06 21:09:35,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161657479] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570489904] [2022-04-06 21:09:35,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:09:35,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:35,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:35,261 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 21:09:35,262 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 21:09:35,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:09:35,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:35,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:09:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:35,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:37,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570489904] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:37,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:37,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 103 [2022-04-06 21:09:37,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:37,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [121717080] [2022-04-06 21:09:37,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [121717080] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:37,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:37,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 21:09:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804697437] [2022-04-06 21:09:37,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:37,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 21:09:37,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 21:09:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:37,235 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:38,855 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-04-06 21:09:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 21:09:38,855 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 21:09:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:38,856 INFO L225 Difference]: With dead ends: 84 [2022-04-06 21:09:38,856 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 21:09:38,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11951, Invalid=16441, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 21:09:38,860 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:38,860 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 59 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 21:09:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-04-06 21:09:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-04-06 21:09:38,863 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2022-04-06 21:09:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:38,864 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-04-06 21:09:38,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-04-06 21:09:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 21:09:38,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:38,864 INFO L499 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:38,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:39,086 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 21:09:39,086 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:39,087 INFO L85 PathProgramCache]: Analyzing trace with hash -621736360, now seen corresponding path program 131 times [2022-04-06 21:09:39,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:39,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26939495] [2022-04-06 21:09:39,088 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:39,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash -621736360, now seen corresponding path program 132 times [2022-04-06 21:09:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698005763] [2022-04-06 21:09:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:40,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:40,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:40,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698005763] [2022-04-06 21:09:40,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698005763] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:40,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631605586] [2022-04-06 21:09:40,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:09:40,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:40,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:40,477 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 21:09:40,479 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 21:09:40,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-06 21:09:40,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:40,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 21:09:40,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:40,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631605586] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:42,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:42,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 103 [2022-04-06 21:09:42,490 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:42,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26939495] [2022-04-06 21:09:42,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26939495] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:42,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:42,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 21:09:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626195176] [2022-04-06 21:09:42,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:42,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 21:09:42,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 21:09:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:42,493 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:44,198 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-04-06 21:09:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 21:09:44,199 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-04-06 21:09:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:44,199 INFO L225 Difference]: With dead ends: 85 [2022-04-06 21:09:44,199 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 21:09:44,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12054, Invalid=16676, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 21:09:44,201 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:44,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 21:09:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-04-06 21:09:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-04-06 21:09:44,204 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2022-04-06 21:09:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:44,205 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-04-06 21:09:44,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-04-06 21:09:44,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 21:09:44,205 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:44,205 INFO L499 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:44,228 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 21:09:44,419 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 21:09:44,419 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2058569146, now seen corresponding path program 133 times [2022-04-06 21:09:44,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:44,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1423870450] [2022-04-06 21:09:44,420 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:44,420 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:44,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2058569146, now seen corresponding path program 134 times [2022-04-06 21:09:44,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:44,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633218929] [2022-04-06 21:09:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:44,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:45,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:45,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:45,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633218929] [2022-04-06 21:09:45,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633218929] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:45,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973629505] [2022-04-06 21:09:45,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:09:45,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:45,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:45,874 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 21:09:45,874 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 21:09:45,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:09:45,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:45,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 21:09:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:46,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:47,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973629505] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:47,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:47,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 103 [2022-04-06 21:09:47,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:47,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1423870450] [2022-04-06 21:09:47,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1423870450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:47,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:47,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 21:09:47,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408581076] [2022-04-06 21:09:47,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:47,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 21:09:47,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 21:09:47,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:47,770 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:49,506 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-04-06 21:09:49,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 21:09:49,506 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 21:09:49,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:49,506 INFO L225 Difference]: With dead ends: 86 [2022-04-06 21:09:49,506 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 21:09:49,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12157, Invalid=16913, Unknown=0, NotChecked=0, Total=29070 [2022-04-06 21:09:49,508 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:49,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 21:09:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 21:09:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-04-06 21:09:49,511 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2022-04-06 21:09:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:49,511 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-04-06 21:09:49,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-04-06 21:09:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 21:09:49,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:49,511 INFO L499 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:49,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:49,712 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 21:09:49,712 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:49,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:49,712 INFO L85 PathProgramCache]: Analyzing trace with hash 644254744, now seen corresponding path program 135 times [2022-04-06 21:09:49,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:49,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [808831283] [2022-04-06 21:09:49,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:49,713 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:49,713 INFO L85 PathProgramCache]: Analyzing trace with hash 644254744, now seen corresponding path program 136 times [2022-04-06 21:09:49,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:49,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043872287] [2022-04-06 21:09:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:49,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:51,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:51,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:51,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043872287] [2022-04-06 21:09:51,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043872287] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:51,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132363817] [2022-04-06 21:09:51,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:09:51,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:51,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:51,214 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 21:09:51,215 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 21:09:51,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:09:51,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 21:09:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:51,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:53,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132363817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:53,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:53,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 103 [2022-04-06 21:09:53,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:53,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [808831283] [2022-04-06 21:09:53,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [808831283] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:53,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:53,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 21:09:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575393281] [2022-04-06 21:09:53,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:53,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 21:09:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 21:09:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:53,072 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 71 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:54,870 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2022-04-06 21:09:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 21:09:54,870 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 71 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-04-06 21:09:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:54,871 INFO L225 Difference]: With dead ends: 87 [2022-04-06 21:09:54,871 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 21:09:54,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12260, Invalid=17152, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 21:09:54,873 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:54,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 21:09:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-06 21:09:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-04-06 21:09:54,876 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2022-04-06 21:09:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:54,876 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-04-06 21:09:54,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 71 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:09:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-04-06 21:09:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 21:09:54,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:54,877 INFO L499 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:54,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:55,095 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 21:09:55,095 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1467550586, now seen corresponding path program 137 times [2022-04-06 21:09:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:55,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051136353] [2022-04-06 21:09:55,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:09:55,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:09:55,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1467550586, now seen corresponding path program 138 times [2022-04-06 21:09:55,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:09:55,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444892925] [2022-04-06 21:09:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:09:55,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:09:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:56,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:56,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:56,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444892925] [2022-04-06 21:09:56,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444892925] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:56,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617108549] [2022-04-06 21:09:56,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:09:56,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:56,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:56,610 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 21:09:56,611 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 21:09:56,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2022-04-06 21:09:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:09:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:56,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:09:58,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617108549] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:58,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:58,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 103 [2022-04-06 21:09:58,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1051136353] [2022-04-06 21:09:58,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1051136353] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:58,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:58,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 21:09:58,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763118005] [2022-04-06 21:09:58,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:58,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 21:09:58,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:58,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 21:09:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:09:58,456 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 72 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:00,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:00,306 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-04-06 21:10:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 21:10:00,307 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 72 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 21:10:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:00,307 INFO L225 Difference]: With dead ends: 88 [2022-04-06 21:10:00,307 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 21:10:00,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12363, Invalid=17393, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 21:10:00,309 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:00,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:00,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 21:10:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-04-06 21:10:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-04-06 21:10:00,311 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2022-04-06 21:10:00,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:00,312 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-04-06 21:10:00,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 72 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-04-06 21:10:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 21:10:00,312 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:00,312 INFO L499 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:00,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 21:10:00,512 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 21:10:00,512 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:00,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1785960920, now seen corresponding path program 139 times [2022-04-06 21:10:00,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:00,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858959955] [2022-04-06 21:10:00,513 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:00,513 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:00,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1785960920, now seen corresponding path program 140 times [2022-04-06 21:10:00,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:00,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936444978] [2022-04-06 21:10:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:00,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:02,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:02,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936444978] [2022-04-06 21:10:02,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936444978] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:02,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451255705] [2022-04-06 21:10:02,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:10:02,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:02,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:02,074 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 21:10:02,074 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 21:10:02,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:10:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:02,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 21:10:02,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:02,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:03,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451255705] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:03,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:03,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 103 [2022-04-06 21:10:03,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858959955] [2022-04-06 21:10:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858959955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:03,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:03,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 21:10:03,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939968645] [2022-04-06 21:10:03,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:03,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 21:10:03,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 21:10:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:03,859 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:05,729 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-04-06 21:10:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 21:10:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-04-06 21:10:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:05,730 INFO L225 Difference]: With dead ends: 89 [2022-04-06 21:10:05,730 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 21:10:05,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12466, Invalid=17636, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 21:10:05,732 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:05,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 21:10:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 21:10:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-04-06 21:10:05,735 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2022-04-06 21:10:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:05,735 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-04-06 21:10:05,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-04-06 21:10:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 21:10:05,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:05,736 INFO L499 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:05,752 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 21:10:05,939 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 21:10:05,940 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash -434397498, now seen corresponding path program 141 times [2022-04-06 21:10:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:05,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [878790861] [2022-04-06 21:10:05,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:05,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash -434397498, now seen corresponding path program 142 times [2022-04-06 21:10:05,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:05,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390786434] [2022-04-06 21:10:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:05,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:07,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390786434] [2022-04-06 21:10:07,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390786434] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534111348] [2022-04-06 21:10:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:10:07,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:07,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:07,555 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 21:10:07,555 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 21:10:07,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:10:07,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 21:10:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:07,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:09,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534111348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:09,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:09,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 103 [2022-04-06 21:10:09,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:09,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [878790861] [2022-04-06 21:10:09,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [878790861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:09,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:09,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 21:10:09,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179826355] [2022-04-06 21:10:09,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:09,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 21:10:09,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:09,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 21:10:09,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:09,314 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 74 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:11,237 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-04-06 21:10:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 21:10:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 74 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 21:10:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:11,238 INFO L225 Difference]: With dead ends: 90 [2022-04-06 21:10:11,238 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 21:10:11,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2655 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12569, Invalid=17881, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 21:10:11,241 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:11,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 21:10:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-06 21:10:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-04-06 21:10:11,244 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2022-04-06 21:10:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:11,245 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-04-06 21:10:11,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 74 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-04-06 21:10:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 21:10:11,245 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:11,245 INFO L499 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:11,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 21:10:11,459 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 21:10:11,459 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash -546031720, now seen corresponding path program 143 times [2022-04-06 21:10:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:11,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779603240] [2022-04-06 21:10:11,460 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:11,460 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:11,461 INFO L85 PathProgramCache]: Analyzing trace with hash -546031720, now seen corresponding path program 144 times [2022-04-06 21:10:11,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:11,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809401181] [2022-04-06 21:10:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:11,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:13,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:13,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:13,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809401181] [2022-04-06 21:10:13,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809401181] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:13,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643376051] [2022-04-06 21:10:13,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:10:13,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:13,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:13,133 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 21:10:13,134 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 21:10:13,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-04-06 21:10:13,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:13,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 21:10:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:13,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:14,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643376051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:14,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:14,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 103 [2022-04-06 21:10:14,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779603240] [2022-04-06 21:10:14,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779603240] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:14,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:14,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 21:10:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456827014] [2022-04-06 21:10:14,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:14,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 21:10:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 21:10:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:14,908 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:16,884 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2022-04-06 21:10:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 21:10:16,885 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-04-06 21:10:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:16,885 INFO L225 Difference]: With dead ends: 91 [2022-04-06 21:10:16,885 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 21:10:16,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12672, Invalid=18128, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 21:10:16,887 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:16,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:16,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 21:10:16,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-06 21:10:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-04-06 21:10:16,890 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2022-04-06 21:10:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:16,890 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-04-06 21:10:16,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-04-06 21:10:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 21:10:16,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:16,890 INFO L499 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:16,906 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 21:10:17,091 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 21:10:17,091 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash 288274694, now seen corresponding path program 145 times [2022-04-06 21:10:17,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:17,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [612126816] [2022-04-06 21:10:17,092 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:17,092 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash 288274694, now seen corresponding path program 146 times [2022-04-06 21:10:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769566925] [2022-04-06 21:10:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:17,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:18,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:18,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:18,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769566925] [2022-04-06 21:10:18,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769566925] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:18,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991788906] [2022-04-06 21:10:18,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:10:18,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:18,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:18,796 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 21:10:18,797 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 21:10:18,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:10:18,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:18,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 21:10:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:18,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:20,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991788906] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:20,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:20,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 103 [2022-04-06 21:10:20,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:20,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [612126816] [2022-04-06 21:10:20,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [612126816] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:20,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:20,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 21:10:20,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029010401] [2022-04-06 21:10:20,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:20,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 21:10:20,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 21:10:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:20,498 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 76 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:22,532 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-04-06 21:10:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 21:10:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 76 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 21:10:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:22,532 INFO L225 Difference]: With dead ends: 92 [2022-04-06 21:10:22,532 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 21:10:22,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12775, Invalid=18377, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 21:10:22,535 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:22,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 21:10:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-04-06 21:10:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-04-06 21:10:22,538 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2022-04-06 21:10:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:22,538 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-04-06 21:10:22,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 76 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-04-06 21:10:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 21:10:22,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:22,539 INFO L499 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:22,563 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 21:10:22,755 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 21:10:22,755 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:22,756 INFO L85 PathProgramCache]: Analyzing trace with hash 381969752, now seen corresponding path program 147 times [2022-04-06 21:10:22,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:22,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450201849] [2022-04-06 21:10:22,757 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:22,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:22,757 INFO L85 PathProgramCache]: Analyzing trace with hash 381969752, now seen corresponding path program 148 times [2022-04-06 21:10:22,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:22,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537882796] [2022-04-06 21:10:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:22,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:24,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:24,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:24,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537882796] [2022-04-06 21:10:24,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537882796] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:24,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193415254] [2022-04-06 21:10:24,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:10:24,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:24,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:24,521 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 21:10:24,522 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 21:10:24,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:10:24,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 21:10:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:24,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:26,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193415254] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:26,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:26,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 103 [2022-04-06 21:10:26,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:26,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450201849] [2022-04-06 21:10:26,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450201849] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:26,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:26,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 21:10:26,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7454685] [2022-04-06 21:10:26,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:26,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 21:10:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 21:10:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:26,229 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 77 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:28,346 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-04-06 21:10:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 21:10:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 77 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-04-06 21:10:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:28,347 INFO L225 Difference]: With dead ends: 93 [2022-04-06 21:10:28,347 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 21:10:28,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12878, Invalid=18628, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 21:10:28,348 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:28,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 21:10:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-06 21:10:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-04-06 21:10:28,351 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2022-04-06 21:10:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:28,351 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-04-06 21:10:28,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 77 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-04-06 21:10:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 21:10:28,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:28,351 INFO L499 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:28,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 21:10:28,558 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 21:10:28,558 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1008450746, now seen corresponding path program 149 times [2022-04-06 21:10:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:28,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1703825103] [2022-04-06 21:10:28,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:28,560 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:28,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1008450746, now seen corresponding path program 150 times [2022-04-06 21:10:28,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:28,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099645430] [2022-04-06 21:10:28,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:28,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:30,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:30,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099645430] [2022-04-06 21:10:30,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099645430] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493162378] [2022-04-06 21:10:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:10:30,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:30,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:30,334 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 21:10:30,334 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 21:10:30,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2022-04-06 21:10:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:30,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 21:10:30,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:30,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:31,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493162378] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:31,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:31,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 103 [2022-04-06 21:10:31,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:31,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1703825103] [2022-04-06 21:10:31,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1703825103] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:31,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:31,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 21:10:31,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951671391] [2022-04-06 21:10:31,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:31,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 21:10:31,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:32,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 21:10:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:32,001 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 78 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:34,148 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-04-06 21:10:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 21:10:34,149 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 78 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-04-06 21:10:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:34,149 INFO L225 Difference]: With dead ends: 94 [2022-04-06 21:10:34,149 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 21:10:34,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12981, Invalid=18881, Unknown=0, NotChecked=0, Total=31862 [2022-04-06 21:10:34,153 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:34,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 21:10:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-04-06 21:10:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-04-06 21:10:34,157 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2022-04-06 21:10:34,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:34,157 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-04-06 21:10:34,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 78 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-04-06 21:10:34,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 21:10:34,158 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:34,158 INFO L499 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:34,182 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 21:10:34,371 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 21:10:34,371 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1161813224, now seen corresponding path program 151 times [2022-04-06 21:10:34,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [422495727] [2022-04-06 21:10:34,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:34,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:34,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1161813224, now seen corresponding path program 152 times [2022-04-06 21:10:34,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:34,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293509650] [2022-04-06 21:10:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:34,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:36,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:36,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:36,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293509650] [2022-04-06 21:10:36,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293509650] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:36,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542226267] [2022-04-06 21:10:36,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:10:36,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:36,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:36,221 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 21:10:36,222 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 21:10:36,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:10:36,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:36,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 21:10:36,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:36,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:37,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542226267] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:37,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:37,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 103 [2022-04-06 21:10:37,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:37,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [422495727] [2022-04-06 21:10:37,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [422495727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:37,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:37,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 21:10:37,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755174231] [2022-04-06 21:10:37,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:37,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 21:10:37,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:37,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 21:10:37,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:37,811 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 79 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:40,001 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-04-06 21:10:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 21:10:40,001 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 79 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-04-06 21:10:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:40,001 INFO L225 Difference]: With dead ends: 95 [2022-04-06 21:10:40,001 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 21:10:40,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13084, Invalid=19136, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 21:10:40,003 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:40,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 21:10:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 21:10:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-04-06 21:10:40,007 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2022-04-06 21:10:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:40,007 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-04-06 21:10:40,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 79 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-04-06 21:10:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 21:10:40,008 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:40,008 INFO L499 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:40,033 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 21:10:40,223 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 21:10:40,223 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1621082746, now seen corresponding path program 153 times [2022-04-06 21:10:40,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:40,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [603703892] [2022-04-06 21:10:40,225 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:40,225 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:40,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1621082746, now seen corresponding path program 154 times [2022-04-06 21:10:40,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:40,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134190715] [2022-04-06 21:10:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:40,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:42,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:42,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:42,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134190715] [2022-04-06 21:10:42,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134190715] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:42,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710613843] [2022-04-06 21:10:42,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:10:42,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:42,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:42,111 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 21:10:42,139 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 21:10:42,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:10:42,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:10:42,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:42,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:43,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710613843] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:43,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:43,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 103 [2022-04-06 21:10:43,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:43,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [603703892] [2022-04-06 21:10:43,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [603703892] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:43,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:43,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 21:10:43,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616428527] [2022-04-06 21:10:43,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:43,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 21:10:43,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:43,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 21:10:43,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:43,650 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 80 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:45,877 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-04-06 21:10:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 21:10:45,878 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 80 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 21:10:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:45,878 INFO L225 Difference]: With dead ends: 96 [2022-04-06 21:10:45,878 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 21:10:45,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13187, Invalid=19393, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 21:10:45,880 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:45,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 21:10:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-04-06 21:10:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-04-06 21:10:45,883 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2022-04-06 21:10:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:45,883 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-04-06 21:10:45,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 80 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-04-06 21:10:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 21:10:45,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:45,883 INFO L499 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:45,899 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 21:10:46,083 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 21:10:46,084 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1321431256, now seen corresponding path program 155 times [2022-04-06 21:10:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:46,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031487450] [2022-04-06 21:10:46,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:46,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:46,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1321431256, now seen corresponding path program 156 times [2022-04-06 21:10:46,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:46,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207825460] [2022-04-06 21:10:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:46,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:47,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:47,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207825460] [2022-04-06 21:10:47,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207825460] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891363723] [2022-04-06 21:10:47,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:10:47,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:47,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:47,996 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 21:10:47,997 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 21:10:48,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-04-06 21:10:48,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 21:10:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:48,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:49,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891363723] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:49,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:49,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 103 [2022-04-06 21:10:49,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:49,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031487450] [2022-04-06 21:10:49,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031487450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:49,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:49,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 21:10:49,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416020495] [2022-04-06 21:10:49,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:49,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 21:10:49,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:49,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 21:10:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:49,482 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:51,780 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2022-04-06 21:10:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 21:10:51,780 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-04-06 21:10:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:51,781 INFO L225 Difference]: With dead ends: 97 [2022-04-06 21:10:51,781 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 21:10:51,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13290, Invalid=19652, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 21:10:51,782 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:51,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 21:10:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-04-06 21:10:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-04-06 21:10:51,785 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2022-04-06 21:10:51,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:51,785 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-04-06 21:10:51,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:51,785 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-04-06 21:10:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 21:10:51,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:51,785 INFO L499 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:51,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-06 21:10:51,985 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 21:10:51,986 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1949915194, now seen corresponding path program 157 times [2022-04-06 21:10:51,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:51,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1803723978] [2022-04-06 21:10:51,987 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:51,987 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1949915194, now seen corresponding path program 158 times [2022-04-06 21:10:51,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:51,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658850103] [2022-04-06 21:10:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:51,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:53,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:53,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:53,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658850103] [2022-04-06 21:10:53,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658850103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:53,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398375942] [2022-04-06 21:10:53,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:10:53,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:53,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:53,987 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 21:10:53,988 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 21:10:54,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:10:54,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:10:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 21:10:54,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:10:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:54,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:10:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:55,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398375942] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:10:55,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:10:55,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 103 [2022-04-06 21:10:55,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:10:55,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1803723978] [2022-04-06 21:10:55,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1803723978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:10:55,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:10:55,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 21:10:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199127627] [2022-04-06 21:10:55,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:10:55,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 21:10:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 21:10:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:10:55,421 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:10:57,743 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-04-06 21:10:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 21:10:57,743 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 21:10:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:10:57,744 INFO L225 Difference]: With dead ends: 98 [2022-04-06 21:10:57,744 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 21:10:57,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13393, Invalid=19913, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 21:10:57,745 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:10:57,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:10:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 21:10:57,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-04-06 21:10:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-04-06 21:10:57,748 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2022-04-06 21:10:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:10:57,748 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-04-06 21:10:57,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:10:57,749 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-04-06 21:10:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 21:10:57,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:10:57,749 INFO L499 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:10:57,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-06 21:10:57,955 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 21:10:57,955 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:10:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:10:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -282440040, now seen corresponding path program 159 times [2022-04-06 21:10:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:10:57,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847346039] [2022-04-06 21:10:57,956 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:10:57,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:10:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash -282440040, now seen corresponding path program 160 times [2022-04-06 21:10:57,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:10:57,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89364933] [2022-04-06 21:10:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:10:57,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:10:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:59,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:10:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:10:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:10:59,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:10:59,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89364933] [2022-04-06 21:10:59,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89364933] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:10:59,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543825632] [2022-04-06 21:10:59,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:10:59,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:10:59,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:10:59,977 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 21:10:59,977 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 21:11:00,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:11:00,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:00,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 21:11:00,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:00,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:01,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543825632] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:01,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:01,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 103 [2022-04-06 21:11:01,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:01,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847346039] [2022-04-06 21:11:01,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847346039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:01,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:01,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 21:11:01,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162389311] [2022-04-06 21:11:01,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:01,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 21:11:01,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 21:11:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:01,377 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:03,773 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2022-04-06 21:11:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 21:11:03,773 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-04-06 21:11:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:03,774 INFO L225 Difference]: With dead ends: 99 [2022-04-06 21:11:03,774 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 21:11:03,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3339 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13496, Invalid=20176, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 21:11:03,776 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:03,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 21:11:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-04-06 21:11:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-04-06 21:11:03,778 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2022-04-06 21:11:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:03,778 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-04-06 21:11:03,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-04-06 21:11:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 21:11:03,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:03,779 INFO L499 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:03,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 21:11:03,979 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 21:11:03,979 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:03,979 INFO L85 PathProgramCache]: Analyzing trace with hash -130317818, now seen corresponding path program 161 times [2022-04-06 21:11:03,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:03,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1794450692] [2022-04-06 21:11:03,980 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:03,980 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash -130317818, now seen corresponding path program 162 times [2022-04-06 21:11:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:03,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130214990] [2022-04-06 21:11:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:03,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:06,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:06,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130214990] [2022-04-06 21:11:06,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130214990] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699323451] [2022-04-06 21:11:06,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:11:06,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:06,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:06,057 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 21:11:06,066 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 21:11:06,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-04-06 21:11:06,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 21:11:06,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:06,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:07,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699323451] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:07,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:07,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 103 [2022-04-06 21:11:07,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1794450692] [2022-04-06 21:11:07,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1794450692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:07,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:07,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 21:11:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672287353] [2022-04-06 21:11:07,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:07,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 21:11:07,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:07,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 21:11:07,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:07,422 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 84 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:09,847 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-04-06 21:11:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 21:11:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 84 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 21:11:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:09,848 INFO L225 Difference]: With dead ends: 100 [2022-04-06 21:11:09,848 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 21:11:09,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3420 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13599, Invalid=20441, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 21:11:09,849 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:09,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 21:11:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-04-06 21:11:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-04-06 21:11:09,854 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2022-04-06 21:11:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:09,854 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-04-06 21:11:09,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 84 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-04-06 21:11:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 21:11:09,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:09,855 INFO L499 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:09,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 21:11:10,059 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 21:11:10,060 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash 290503768, now seen corresponding path program 163 times [2022-04-06 21:11:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:10,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1982520388] [2022-04-06 21:11:10,061 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:10,061 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:10,061 INFO L85 PathProgramCache]: Analyzing trace with hash 290503768, now seen corresponding path program 164 times [2022-04-06 21:11:10,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:10,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316688033] [2022-04-06 21:11:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:10,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:12,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:12,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316688033] [2022-04-06 21:11:12,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316688033] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138184230] [2022-04-06 21:11:12,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:11:12,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:12,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:12,173 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 21:11:12,173 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 21:11:12,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:11:12,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:12,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 21:11:12,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:12,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:13,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138184230] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:13,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:13,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 103 [2022-04-06 21:11:13,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:13,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1982520388] [2022-04-06 21:11:13,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1982520388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:13,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:13,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 21:11:13,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447968761] [2022-04-06 21:11:13,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:13,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 21:11:13,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 21:11:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:13,475 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 85 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:15,969 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2022-04-06 21:11:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 21:11:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 85 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-04-06 21:11:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:15,969 INFO L225 Difference]: With dead ends: 101 [2022-04-06 21:11:15,969 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 21:11:15,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3502 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13702, Invalid=20708, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 21:11:15,971 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:15,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 21:11:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-04-06 21:11:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-04-06 21:11:15,973 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2022-04-06 21:11:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:15,974 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-04-06 21:11:15,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 85 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-04-06 21:11:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 21:11:15,974 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:15,974 INFO L499 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:15,994 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 21:11:16,175 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 21:11:16,175 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash 451071046, now seen corresponding path program 165 times [2022-04-06 21:11:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:16,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1013432922] [2022-04-06 21:11:16,176 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:16,176 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash 451071046, now seen corresponding path program 166 times [2022-04-06 21:11:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:16,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929423626] [2022-04-06 21:11:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:16,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:18,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:18,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:18,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929423626] [2022-04-06 21:11:18,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929423626] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:18,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143157107] [2022-04-06 21:11:18,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:11:18,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:18,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:18,317 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 21:11:18,317 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 21:11:18,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:11:18,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:18,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 21:11:18,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:18,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:19,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143157107] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:19,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:19,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 103 [2022-04-06 21:11:19,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:19,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1013432922] [2022-04-06 21:11:19,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1013432922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:19,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:19,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 21:11:19,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476773399] [2022-04-06 21:11:19,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:19,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 21:11:19,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:19,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 21:11:19,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:19,574 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:22,130 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-04-06 21:11:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 21:11:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 21:11:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:22,131 INFO L225 Difference]: With dead ends: 102 [2022-04-06 21:11:22,131 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 21:11:22,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3585 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13805, Invalid=20977, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 21:11:22,132 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:22,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 21:11:22,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-04-06 21:11:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-04-06 21:11:22,135 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2022-04-06 21:11:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:22,136 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-04-06 21:11:22,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-04-06 21:11:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-06 21:11:22,136 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:22,136 INFO L499 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:22,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 21:11:22,336 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 21:11:22,337 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:22,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1133689368, now seen corresponding path program 167 times [2022-04-06 21:11:22,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:22,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863419536] [2022-04-06 21:11:22,338 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:22,338 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1133689368, now seen corresponding path program 168 times [2022-04-06 21:11:22,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:22,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827355865] [2022-04-06 21:11:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:22,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:24,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:24,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:24,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827355865] [2022-04-06 21:11:24,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827355865] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:24,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843374748] [2022-04-06 21:11:24,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:11:24,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:24,538 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 21:11:24,538 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 21:11:24,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-04-06 21:11:24,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 21:11:24,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:24,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:25,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843374748] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:25,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:25,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 103 [2022-04-06 21:11:25,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:25,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863419536] [2022-04-06 21:11:25,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863419536] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:25,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:25,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 21:11:25,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893132215] [2022-04-06 21:11:25,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:25,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 21:11:25,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 21:11:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:25,780 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 87 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:28,445 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2022-04-06 21:11:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 21:11:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 87 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-04-06 21:11:28,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:28,446 INFO L225 Difference]: With dead ends: 103 [2022-04-06 21:11:28,446 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 21:11:28,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13908, Invalid=21248, Unknown=0, NotChecked=0, Total=35156 [2022-04-06 21:11:28,447 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:28,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 21:11:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-04-06 21:11:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-04-06 21:11:28,450 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2022-04-06 21:11:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:28,450 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-04-06 21:11:28,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 87 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-04-06 21:11:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 21:11:28,451 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:28,451 INFO L499 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:28,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 21:11:28,651 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 21:11:28,652 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:28,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:28,652 INFO L85 PathProgramCache]: Analyzing trace with hash 820020870, now seen corresponding path program 169 times [2022-04-06 21:11:28,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:28,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [873787728] [2022-04-06 21:11:28,653 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:28,653 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash 820020870, now seen corresponding path program 170 times [2022-04-06 21:11:28,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:28,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605706319] [2022-04-06 21:11:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:28,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:30,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:30,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:30,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605706319] [2022-04-06 21:11:30,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605706319] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:30,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739586504] [2022-04-06 21:11:30,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:11:30,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:30,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:30,927 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 21:11:30,928 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 21:11:30,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:11:30,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 21:11:30,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:31,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:32,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739586504] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:32,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:32,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 103 [2022-04-06 21:11:32,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:32,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [873787728] [2022-04-06 21:11:32,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [873787728] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:32,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:32,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 21:11:32,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127156271] [2022-04-06 21:11:32,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:32,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 21:11:32,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 21:11:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:32,093 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 88 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:34,727 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-04-06 21:11:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 21:11:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 88 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-04-06 21:11:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:34,728 INFO L225 Difference]: With dead ends: 104 [2022-04-06 21:11:34,728 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 21:11:34,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3754 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14011, Invalid=21521, Unknown=0, NotChecked=0, Total=35532 [2022-04-06 21:11:34,730 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:34,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 21:11:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-04-06 21:11:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-04-06 21:11:34,734 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2022-04-06 21:11:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:34,734 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-04-06 21:11:34,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 88 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-04-06 21:11:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 21:11:34,734 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:34,734 INFO L499 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:34,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 21:11:34,935 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 21:11:34,935 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:34,935 INFO L85 PathProgramCache]: Analyzing trace with hash -313767976, now seen corresponding path program 171 times [2022-04-06 21:11:34,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:34,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [161461936] [2022-04-06 21:11:34,936 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:34,936 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -313767976, now seen corresponding path program 172 times [2022-04-06 21:11:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:34,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856032511] [2022-04-06 21:11:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:37,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:37,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:37,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856032511] [2022-04-06 21:11:37,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856032511] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:37,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744693830] [2022-04-06 21:11:37,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:11:37,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:37,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:37,270 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 21:11:37,271 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 21:11:37,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:11:37,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 21:11:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:37,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:38,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744693830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:38,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:38,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 103 [2022-04-06 21:11:38,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:38,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [161461936] [2022-04-06 21:11:38,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [161461936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:38,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:38,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 21:11:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196240205] [2022-04-06 21:11:38,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:38,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 21:11:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 21:11:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:38,407 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 89 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:41,144 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-04-06 21:11:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 21:11:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 89 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-04-06 21:11:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:41,145 INFO L225 Difference]: With dead ends: 105 [2022-04-06 21:11:41,145 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 21:11:41,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14114, Invalid=21796, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 21:11:41,146 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:41,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 21:11:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 21:11:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2022-04-06 21:11:41,149 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2022-04-06 21:11:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:41,149 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2022-04-06 21:11:41,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 89 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2022-04-06 21:11:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 21:11:41,150 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:41,150 INFO L499 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:41,175 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 21:11:41,371 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 21:11:41,372 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:41,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1101483834, now seen corresponding path program 173 times [2022-04-06 21:11:41,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:41,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [325690840] [2022-04-06 21:11:41,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:41,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:41,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1101483834, now seen corresponding path program 174 times [2022-04-06 21:11:41,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:41,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75053237] [2022-04-06 21:11:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:41,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:43,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:43,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75053237] [2022-04-06 21:11:43,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75053237] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101204362] [2022-04-06 21:11:43,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:11:43,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:43,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:43,723 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 21:11:43,723 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 21:11:43,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2022-04-06 21:11:43,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:43,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 21:11:43,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:43,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:44,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101204362] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:44,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:44,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 103 [2022-04-06 21:11:44,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [325690840] [2022-04-06 21:11:44,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [325690840] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:44,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:44,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 21:11:44,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489548048] [2022-04-06 21:11:44,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:44,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 21:11:44,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 21:11:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:44,859 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:47,635 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-04-06 21:11:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 21:11:47,636 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-04-06 21:11:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:47,636 INFO L225 Difference]: With dead ends: 106 [2022-04-06 21:11:47,636 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 21:11:47,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14217, Invalid=22073, Unknown=0, NotChecked=0, Total=36290 [2022-04-06 21:11:47,638 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:47,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 21:11:47,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-04-06 21:11:47,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-04-06 21:11:47,641 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2022-04-06 21:11:47,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:47,641 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-04-06 21:11:47,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-04-06 21:11:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 21:11:47,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:47,641 INFO L499 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:47,657 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 21:11:47,842 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 21:11:47,842 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:47,842 INFO L85 PathProgramCache]: Analyzing trace with hash 249128344, now seen corresponding path program 175 times [2022-04-06 21:11:47,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:47,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1948178061] [2022-04-06 21:11:47,843 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:47,843 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash 249128344, now seen corresponding path program 176 times [2022-04-06 21:11:47,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:47,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367567680] [2022-04-06 21:11:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:47,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:50,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:50,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:50,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367567680] [2022-04-06 21:11:50,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367567680] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:50,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528091826] [2022-04-06 21:11:50,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:11:50,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:50,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:50,236 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 21:11:50,237 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 21:11:50,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:11:50,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:50,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 21:11:50,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:50,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:51,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528091826] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:51,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:51,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 103 [2022-04-06 21:11:51,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1948178061] [2022-04-06 21:11:51,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1948178061] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:51,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:51,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 21:11:51,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393051797] [2022-04-06 21:11:51,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:51,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 21:11:51,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 21:11:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:51,314 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 91 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:11:54,147 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2022-04-06 21:11:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 21:11:54,147 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 91 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-04-06 21:11:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:11:54,148 INFO L225 Difference]: With dead ends: 107 [2022-04-06 21:11:54,148 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 21:11:54,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4015 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14320, Invalid=22352, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 21:11:54,149 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:11:54,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:11:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 21:11:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-06 21:11:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2022-04-06 21:11:54,152 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2022-04-06 21:11:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:11:54,152 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2022-04-06 21:11:54,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 91 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:11:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2022-04-06 21:11:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 21:11:54,152 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:11:54,152 INFO L499 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:11:54,168 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 21:11:54,352 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 21:11:54,353 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:11:54,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:11:54,353 INFO L85 PathProgramCache]: Analyzing trace with hash -831567098, now seen corresponding path program 177 times [2022-04-06 21:11:54,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:54,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [639217521] [2022-04-06 21:11:54,354 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:11:54,354 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:11:54,354 INFO L85 PathProgramCache]: Analyzing trace with hash -831567098, now seen corresponding path program 178 times [2022-04-06 21:11:54,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:11:54,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340853139] [2022-04-06 21:11:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:11:54,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:11:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:56,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:11:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:11:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:56,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:11:56,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340853139] [2022-04-06 21:11:56,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340853139] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:11:56,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500432655] [2022-04-06 21:11:56,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:11:56,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:11:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:11:56,825 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 21:11:56,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 21:11:56,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:11:56,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:11:56,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 21:11:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:11:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:57,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:11:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:11:57,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500432655] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:11:57,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:11:57,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 103 [2022-04-06 21:11:57,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:11:57,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [639217521] [2022-04-06 21:11:57,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [639217521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:11:57,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:11:57,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 21:11:57,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217171117] [2022-04-06 21:11:57,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:11:57,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 21:11:57,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:11:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 21:11:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:11:57,808 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 92 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:00,715 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-04-06 21:12:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 21:12:00,716 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 92 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-06 21:12:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:00,716 INFO L225 Difference]: With dead ends: 108 [2022-04-06 21:12:00,716 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 21:12:00,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4104 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14423, Invalid=22633, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 21:12:00,718 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:00,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:12:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 21:12:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 21:12:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-04-06 21:12:00,721 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2022-04-06 21:12:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:00,721 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-04-06 21:12:00,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 92 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-04-06 21:12:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 21:12:00,721 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:00,721 INFO L499 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:00,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 21:12:00,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 21:12:00,925 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash 26612568, now seen corresponding path program 179 times [2022-04-06 21:12:00,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:00,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1472628846] [2022-04-06 21:12:00,926 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:00,926 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash 26612568, now seen corresponding path program 180 times [2022-04-06 21:12:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:00,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554868561] [2022-04-06 21:12:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:00,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:03,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:03,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:03,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554868561] [2022-04-06 21:12:03,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554868561] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:03,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423295563] [2022-04-06 21:12:03,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:12:03,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:03,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:03,466 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:03,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 21:12:03,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-04-06 21:12:03,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:03,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 21:12:03,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:03,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:04,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423295563] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:04,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:04,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 103 [2022-04-06 21:12:04,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:04,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1472628846] [2022-04-06 21:12:04,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1472628846] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:04,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:04,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 21:12:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756602445] [2022-04-06 21:12:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:04,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 21:12:04,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 21:12:04,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:12:04,436 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 93 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:07,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:07,461 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2022-04-06 21:12:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 21:12:07,462 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 93 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 21:12:07,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:07,462 INFO L225 Difference]: With dead ends: 109 [2022-04-06 21:12:07,462 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 21:12:07,463 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4194 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14526, Invalid=22916, Unknown=0, NotChecked=0, Total=37442 [2022-04-06 21:12:07,463 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:07,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:12:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 21:12:07,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-04-06 21:12:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-04-06 21:12:07,467 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2022-04-06 21:12:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:07,467 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-04-06 21:12:07,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 93 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-04-06 21:12:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 21:12:07,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:07,468 INFO L499 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:07,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 21:12:07,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:07,685 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash 860378438, now seen corresponding path program 181 times [2022-04-06 21:12:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:07,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931127139] [2022-04-06 21:12:07,686 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:07,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash 860378438, now seen corresponding path program 182 times [2022-04-06 21:12:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:07,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708988431] [2022-04-06 21:12:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:10,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:10,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:10,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708988431] [2022-04-06 21:12:10,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708988431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:10,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306209307] [2022-04-06 21:12:10,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:12:10,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:10,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:10,318 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:10,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 21:12:10,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:12:10,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:10,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 21:12:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:10,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:11,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306209307] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:11,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:11,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 103 [2022-04-06 21:12:11,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:11,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931127139] [2022-04-06 21:12:11,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931127139] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:11,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:11,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 21:12:11,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574957461] [2022-04-06 21:12:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:11,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 21:12:11,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 21:12:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:12:11,214 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 94 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:14,276 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-04-06 21:12:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 21:12:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 94 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 21:12:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:14,277 INFO L225 Difference]: With dead ends: 110 [2022-04-06 21:12:14,277 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 21:12:14,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4285 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14629, Invalid=23201, Unknown=0, NotChecked=0, Total=37830 [2022-04-06 21:12:14,279 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:14,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:12:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 21:12:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-04-06 21:12:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-04-06 21:12:14,283 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2022-04-06 21:12:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:14,283 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-04-06 21:12:14,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 94 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-04-06 21:12:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 21:12:14,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:14,284 INFO L499 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:14,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 21:12:14,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:14,495 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash 937316632, now seen corresponding path program 183 times [2022-04-06 21:12:14,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:14,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358536297] [2022-04-06 21:12:14,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:14,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:14,497 INFO L85 PathProgramCache]: Analyzing trace with hash 937316632, now seen corresponding path program 184 times [2022-04-06 21:12:14,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:14,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368835656] [2022-04-06 21:12:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:14,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:17,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:17,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:17,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368835656] [2022-04-06 21:12:17,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368835656] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:17,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664038949] [2022-04-06 21:12:17,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:12:17,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:17,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:17,162 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:17,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 21:12:17,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:12:17,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:17,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 21:12:17,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:17,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:18,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664038949] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:18,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:18,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 103 [2022-04-06 21:12:18,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:18,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358536297] [2022-04-06 21:12:18,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358536297] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:18,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:18,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 21:12:18,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742086563] [2022-04-06 21:12:18,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:18,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 21:12:18,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:18,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 21:12:18,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:12:18,019 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 95 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:21,171 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2022-04-06 21:12:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 21:12:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 95 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-04-06 21:12:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:21,172 INFO L225 Difference]: With dead ends: 111 [2022-04-06 21:12:21,172 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 21:12:21,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14732, Invalid=23488, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 21:12:21,173 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:21,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:12:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 21:12:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-06 21:12:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2022-04-06 21:12:21,177 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2022-04-06 21:12:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:21,177 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2022-04-06 21:12:21,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 95 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2022-04-06 21:12:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 21:12:21,178 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:21,178 INFO L499 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:21,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-06 21:12:21,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:21,387 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash -972566650, now seen corresponding path program 185 times [2022-04-06 21:12:21,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:21,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637625121] [2022-04-06 21:12:21,388 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:21,389 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash -972566650, now seen corresponding path program 186 times [2022-04-06 21:12:21,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:21,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425828430] [2022-04-06 21:12:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:21,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:24,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:24,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:24,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425828430] [2022-04-06 21:12:24,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425828430] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:24,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675056643] [2022-04-06 21:12:24,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:12:24,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:24,121 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:24,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 21:12:24,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2022-04-06 21:12:24,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:24,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 21:12:24,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:24,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:25,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675056643] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:25,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:25,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 103 [2022-04-06 21:12:25,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:25,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637625121] [2022-04-06 21:12:25,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637625121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:25,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:25,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 21:12:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882388892] [2022-04-06 21:12:25,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:25,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 21:12:25,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:25,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 21:12:25,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:12:25,020 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:28,220 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-04-06 21:12:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 21:12:28,221 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-04-06 21:12:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:28,223 INFO L225 Difference]: With dead ends: 112 [2022-04-06 21:12:28,223 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 21:12:28,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4470 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14835, Invalid=23777, Unknown=0, NotChecked=0, Total=38612 [2022-04-06 21:12:28,225 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:28,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:12:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 21:12:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-04-06 21:12:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-04-06 21:12:28,229 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2022-04-06 21:12:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:28,230 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-04-06 21:12:28,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-04-06 21:12:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 21:12:28,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:28,230 INFO L499 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:28,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 21:12:28,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:28,453 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:28,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:28,453 INFO L85 PathProgramCache]: Analyzing trace with hash -49406248, now seen corresponding path program 187 times [2022-04-06 21:12:28,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:28,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583217926] [2022-04-06 21:12:28,454 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:28,454 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash -49406248, now seen corresponding path program 188 times [2022-04-06 21:12:28,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:28,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184082848] [2022-04-06 21:12:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:28,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:31,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:31,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184082848] [2022-04-06 21:12:31,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184082848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:31,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67029575] [2022-04-06 21:12:31,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:12:31,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:31,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:31,194 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:31,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 21:12:31,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:12:31,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:31,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 21:12:31,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:31,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:31,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67029575] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:31,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:31,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 103 [2022-04-06 21:12:31,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:31,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583217926] [2022-04-06 21:12:31,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583217926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:31,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:31,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 21:12:31,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487843302] [2022-04-06 21:12:31,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:31,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 21:12:31,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:31,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 21:12:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:12:31,938 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 97 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:35,193 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2022-04-06 21:12:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 21:12:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 97 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-04-06 21:12:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:35,194 INFO L225 Difference]: With dead ends: 113 [2022-04-06 21:12:35,194 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 21:12:35,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4564 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14938, Invalid=24068, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 21:12:35,197 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:35,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:12:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 21:12:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-04-06 21:12:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-04-06 21:12:35,201 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2022-04-06 21:12:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:35,201 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-04-06 21:12:35,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 97 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-04-06 21:12:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 21:12:35,202 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:35,202 INFO L499 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:35,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 21:12:35,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:35,407 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1496204858, now seen corresponding path program 189 times [2022-04-06 21:12:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:35,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373564315] [2022-04-06 21:12:35,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:35,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:35,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1496204858, now seen corresponding path program 190 times [2022-04-06 21:12:35,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:35,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998879592] [2022-04-06 21:12:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:35,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:38,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:38,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998879592] [2022-04-06 21:12:38,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998879592] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:38,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265647787] [2022-04-06 21:12:38,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:12:38,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:38,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:38,229 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:38,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 21:12:38,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:12:38,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:38,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 21:12:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:38,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:38,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265647787] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:38,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:38,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 103 [2022-04-06 21:12:38,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:38,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373564315] [2022-04-06 21:12:38,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373564315] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:38,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:38,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 21:12:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186428076] [2022-04-06 21:12:38,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:38,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 21:12:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 21:12:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:12:38,965 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 98 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:42,310 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-04-06 21:12:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 21:12:42,310 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 98 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 21:12:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:42,311 INFO L225 Difference]: With dead ends: 114 [2022-04-06 21:12:42,311 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 21:12:42,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4659 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15041, Invalid=24361, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 21:12:42,313 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:42,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:12:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 21:12:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-04-06 21:12:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-04-06 21:12:42,316 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2022-04-06 21:12:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:42,316 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-04-06 21:12:42,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 98 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-04-06 21:12:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 21:12:42,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:42,317 INFO L499 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:42,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-06 21:12:42,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-04-06 21:12:42,531 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash 897678488, now seen corresponding path program 191 times [2022-04-06 21:12:42,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:42,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243532077] [2022-04-06 21:12:42,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:42,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash 897678488, now seen corresponding path program 192 times [2022-04-06 21:12:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687389775] [2022-04-06 21:12:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:45,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:45,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:45,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687389775] [2022-04-06 21:12:45,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687389775] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:45,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676025364] [2022-04-06 21:12:45,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:12:45,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:45,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:45,614 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:45,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 21:12:45,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-04-06 21:12:45,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:45,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 21:12:45,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:45,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:46,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676025364] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:46,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:46,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 103 [2022-04-06 21:12:46,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:46,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243532077] [2022-04-06 21:12:46,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243532077] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:46,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:46,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 21:12:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334507592] [2022-04-06 21:12:46,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:46,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 21:12:46,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:46,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 21:12:46,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:12:46,276 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 100 states, 100 states have (on average 1.04) internal successors, (104), 99 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:49,652 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2022-04-06 21:12:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 21:12:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 99 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-04-06 21:12:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:49,653 INFO L225 Difference]: With dead ends: 115 [2022-04-06 21:12:49,653 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 21:12:49,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4755 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15144, Invalid=24656, Unknown=0, NotChecked=0, Total=39800 [2022-04-06 21:12:49,655 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:49,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:12:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 21:12:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-04-06 21:12:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2022-04-06 21:12:49,658 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2022-04-06 21:12:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:49,658 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2022-04-06 21:12:49,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 99 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2022-04-06 21:12:49,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 21:12:49,659 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:49,659 INFO L499 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:49,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 21:12:49,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:49,859 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:49,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2093618182, now seen corresponding path program 193 times [2022-04-06 21:12:49,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:49,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [396064991] [2022-04-06 21:12:49,860 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:49,860 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2093618182, now seen corresponding path program 194 times [2022-04-06 21:12:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:49,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983637537] [2022-04-06 21:12:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:52,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:12:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:12:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:52,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:12:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983637537] [2022-04-06 21:12:52,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983637537] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:12:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646055960] [2022-04-06 21:12:52,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:12:52,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:52,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:12:52,808 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:12:52,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 21:12:52,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:12:52,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:12:52,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 21:12:52,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:12:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:53,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:12:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:12:53,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646055960] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:12:53,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:12:53,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 103 [2022-04-06 21:12:53,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:12:53,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [396064991] [2022-04-06 21:12:53,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [396064991] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:12:53,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:12:53,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 21:12:53,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933698427] [2022-04-06 21:12:53,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:12:53,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 21:12:53,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:53,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 21:12:53,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:12:53,397 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 100 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:12:56,870 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-04-06 21:12:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 21:12:56,873 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 100 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 21:12:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:12:56,874 INFO L225 Difference]: With dead ends: 116 [2022-04-06 21:12:56,874 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 21:12:56,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4852 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=15247, Invalid=24953, Unknown=0, NotChecked=0, Total=40200 [2022-04-06 21:12:56,876 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:12:56,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:12:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 21:12:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-04-06 21:12:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-04-06 21:12:56,879 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2022-04-06 21:12:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:12:56,879 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-04-06 21:12:56,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 100 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:12:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-04-06 21:12:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 21:12:56,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:12:56,879 INFO L499 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:12:56,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-04-06 21:12:57,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:12:57,080 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:12:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:12:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash 513043032, now seen corresponding path program 195 times [2022-04-06 21:12:57,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:12:57,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494550466] [2022-04-06 21:12:57,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:12:57,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:12:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash 513043032, now seen corresponding path program 196 times [2022-04-06 21:12:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:12:57,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650289008] [2022-04-06 21:12:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:12:57,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:12:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:00,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:00,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:00,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650289008] [2022-04-06 21:13:00,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650289008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:00,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588681996] [2022-04-06 21:13:00,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:13:00,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:00,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:00,072 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:00,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 21:13:00,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:13:00,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:00,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 21:13:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:00,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:00,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588681996] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:00,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:00,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 103 [2022-04-06 21:13:00,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:00,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494550466] [2022-04-06 21:13:00,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494550466] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:00,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:00,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 21:13:00,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235540939] [2022-04-06 21:13:00,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:00,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 21:13:00,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:00,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 21:13:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:13:00,593 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 101 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:04,171 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2022-04-06 21:13:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 21:13:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 101 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-04-06 21:13:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:04,172 INFO L225 Difference]: With dead ends: 117 [2022-04-06 21:13:04,172 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 21:13:04,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15350, Invalid=25252, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 21:13:04,174 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:04,174 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:04,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 21:13:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-04-06 21:13:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2022-04-06 21:13:04,177 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2022-04-06 21:13:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:04,177 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2022-04-06 21:13:04,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 101 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2022-04-06 21:13:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 21:13:04,177 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:04,178 INFO L499 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:04,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:04,390 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-06 21:13:04,390 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1240146362, now seen corresponding path program 197 times [2022-04-06 21:13:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:04,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136819552] [2022-04-06 21:13:04,391 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:04,392 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:04,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1240146362, now seen corresponding path program 198 times [2022-04-06 21:13:04,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:04,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025347332] [2022-04-06 21:13:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:04,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:07,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:07,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:07,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025347332] [2022-04-06 21:13:07,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025347332] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:07,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958592081] [2022-04-06 21:13:07,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:13:07,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:07,486 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:07,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 21:13:07,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2022-04-06 21:13:07,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:07,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 21:13:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:07,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:07,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958592081] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:07,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:07,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 103 [2022-04-06 21:13:07,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136819552] [2022-04-06 21:13:07,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136819552] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:07,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:07,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 21:13:07,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765118755] [2022-04-06 21:13:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:07,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 21:13:07,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 21:13:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 21:13:07,989 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 102 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:11,617 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-04-06 21:13:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 21:13:11,617 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 102 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-04-06 21:13:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:11,618 INFO L225 Difference]: With dead ends: 118 [2022-04-06 21:13:11,618 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 21:13:11,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-04-06 21:13:11,620 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:11,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 21:13:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-04-06 21:13:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-04-06 21:13:11,623 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2022-04-06 21:13:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:11,623 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-04-06 21:13:11,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 102 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-04-06 21:13:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-04-06 21:13:11,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:11,624 INFO L499 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:11,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:11,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:11,824 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:11,825 INFO L85 PathProgramCache]: Analyzing trace with hash 245557272, now seen corresponding path program 199 times [2022-04-06 21:13:11,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:11,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1014300745] [2022-04-06 21:13:11,826 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:11,826 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:11,826 INFO L85 PathProgramCache]: Analyzing trace with hash 245557272, now seen corresponding path program 200 times [2022-04-06 21:13:11,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:11,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806231874] [2022-04-06 21:13:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:11,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:15,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:15,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:15,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806231874] [2022-04-06 21:13:15,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806231874] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:15,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727415420] [2022-04-06 21:13:15,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:15,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:15,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:15,991 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:15,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 21:13:16,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:16,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:16,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 205 conjunts are in the unsatisfiable core [2022-04-06 21:13:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:16,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:17,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727415420] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:17,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:13:17,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 108 [2022-04-06 21:13:17,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:17,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1014300745] [2022-04-06 21:13:17,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1014300745] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:17,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:17,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 21:13:17,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950584221] [2022-04-06 21:13:17,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:17,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 21:13:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 21:13:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=11341, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 21:13:17,500 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 106 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 104 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:24,970 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2022-04-06 21:13:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 21:13:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 104 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-04-06 21:13:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:24,971 INFO L225 Difference]: With dead ends: 119 [2022-04-06 21:13:24,971 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 21:13:24,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 219 SyntacticMatches, 5 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5457 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=629, Invalid=43681, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 21:13:24,973 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 11126 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 11230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 11126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:24,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 528 Invalid, 11230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 11126 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 21:13:24,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 21:13:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-04-06 21:13:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-04-06 21:13:24,979 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2022-04-06 21:13:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:24,979 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-04-06 21:13:24,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 104 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:24,979 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-04-06 21:13:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 21:13:24,980 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:24,980 INFO L499 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:25,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:25,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:25,195 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash -942270330, now seen corresponding path program 201 times [2022-04-06 21:13:25,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:25,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2104740947] [2022-04-06 21:13:25,197 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:13:25,197 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:13:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash -942270330, now seen corresponding path program 202 times [2022-04-06 21:13:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:25,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866745772] [2022-04-06 21:13:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:25,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:28,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:13:28,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:28,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866745772] [2022-04-06 21:13:28,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866745772] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:28,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:28,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 21:13:28,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:28,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2104740947] [2022-04-06 21:13:28,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2104740947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:28,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:28,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 21:13:28,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533965700] [2022-04-06 21:13:28,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:28,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 21:13:28,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:28,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 21:13:28,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 21:13:28,487 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 104 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 103 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:30,808 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-04-06 21:13:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 21:13:30,808 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 103 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 21:13:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:30,809 INFO L225 Difference]: With dead ends: 114 [2022-04-06 21:13:30,809 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:13:30,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 21:13:30,811 INFO L913 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:30,811 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:13:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:13:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:13:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 21:13:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:13:30,811 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 113 [2022-04-06 21:13:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:30,811 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:13:30,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 103 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:13:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:13:30,812 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:13:30,814 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:13:30,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-04-06 21:13:30,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 21:13:32,184 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2022-04-06 21:13:32,184 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 11) no Hoare annotation was computed. [2022-04-06 21:13:32,184 INFO L882 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2022-04-06 21:13:32,184 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 29) the Hoare annotation is: true [2022-04-06 21:13:32,184 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-04-06 21:13:32,185 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 29) the Hoare annotation is: true [2022-04-06 21:13:32,185 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-04-06 21:13:32,187 INFO L878 garLoopResultBuilder]: At program point L23-2(lines 23 26) the Hoare annotation is: (or (and (<= 38 main_~i~0) (<= 76 main_~j~0) (<= main_~i~0 38) (<= main_~j~0 76)) (and (<= main_~j~0 88) (<= 88 main_~j~0) (<= 44 main_~i~0) (<= main_~i~0 44)) (and (<= main_~j~0 130) (<= 130 main_~j~0) (<= 65 main_~i~0) (<= main_~i~0 65)) (and (<= main_~i~0 53) (<= 53 main_~i~0) (<= 106 main_~j~0) (<= main_~j~0 106)) (and (<= 86 main_~i~0) (<= main_~i~0 86) (<= 172 main_~j~0) (<= main_~j~0 172)) (and (<= main_~i~0 93) (<= 93 main_~i~0) (<= 186 main_~j~0) (<= main_~j~0 186)) (and (<= main_~j~0 72) (<= 72 main_~j~0) (<= 36 main_~i~0) (<= main_~i~0 36)) (and (<= main_~j~0 12) (<= 12 main_~j~0) (<= main_~i~0 6) (<= 6 main_~i~0)) (and (<= 134 main_~j~0) (<= 67 main_~i~0) (<= main_~i~0 67) (<= main_~j~0 134)) (and (<= 90 main_~i~0) (<= main_~j~0 180) (<= main_~i~0 90) (<= 180 main_~j~0)) (and (<= 148 main_~j~0) (<= main_~j~0 148) (<= 74 main_~i~0) (<= main_~i~0 74)) (and (<= 39 main_~i~0) (<= 78 main_~j~0) (<= main_~i~0 39) (<= main_~j~0 78)) (and (<= 98 main_~i~0) (<= 196 main_~j~0) (<= main_~i~0 98) (<= main_~j~0 196)) (and (<= 23 main_~i~0) (<= main_~i~0 23) (<= 46 main_~j~0) (<= main_~j~0 46)) (and (<= 22 main_~j~0) (<= 11 main_~i~0) (<= main_~j~0 22) (<= main_~i~0 11)) (and (<= 77 main_~i~0) (<= main_~i~0 77) (<= 154 main_~j~0) (<= main_~j~0 154)) (and (<= 136 main_~j~0) (<= main_~j~0 136) (<= 68 main_~i~0) (<= main_~i~0 68)) (and (<= 132 main_~j~0) (<= main_~i~0 66) (<= main_~j~0 132) (<= 66 main_~i~0)) (and (<= 100 main_~i~0) (<= main_~j~0 200) (< 199 main_~j~0)) (and (<= main_~j~0 190) (<= 190 main_~j~0) (<= 95 main_~i~0) (<= main_~i~0 95)) (and (<= 68 main_~j~0) (<= main_~j~0 68) (<= main_~i~0 34) (<= 34 main_~i~0)) (and (<= main_~j~0 92) (<= 46 main_~i~0) (<= main_~i~0 46) (<= 92 main_~j~0)) (and (<= 37 main_~i~0) (<= main_~i~0 37) (<= main_~j~0 74) (<= 74 main_~j~0)) (and (<= 20 main_~i~0) (<= main_~j~0 40) (<= 40 main_~j~0) (<= main_~i~0 20)) (and (<= main_~j~0 162) (<= main_~i~0 81) (<= 162 main_~j~0) (<= 81 main_~i~0)) (and (<= 52 main_~i~0) (<= main_~i~0 52) (<= main_~j~0 104) (<= 104 main_~j~0)) (and (<= 12 main_~i~0) (<= main_~j~0 24) (<= main_~i~0 12) (<= 24 main_~j~0)) (and (<= 31 main_~i~0) (<= main_~i~0 31) (<= main_~j~0 62) (<= 62 main_~j~0)) (and (<= main_~j~0 56) (<= main_~i~0 28) (<= 28 main_~i~0) (<= 56 main_~j~0)) (and (<= main_~j~0 90) (<= 90 main_~j~0) (<= 45 main_~i~0) (<= main_~i~0 45)) (and (<= main_~i~0 63) (<= main_~j~0 126) (<= 126 main_~j~0) (<= 63 main_~i~0)) (and (<= main_~i~0 79) (<= 158 main_~j~0) (<= main_~j~0 158) (<= 79 main_~i~0)) (and (<= 78 main_~i~0) (<= 156 main_~j~0) (<= main_~i~0 78) (<= main_~j~0 156)) (and (<= main_~j~0 198) (<= main_~i~0 99) (<= 99 main_~i~0) (<= 198 main_~j~0)) (and (<= main_~j~0 100) (<= 100 main_~j~0) (<= main_~i~0 50) (<= 50 main_~i~0)) (and (<= 96 main_~j~0) (<= 48 main_~i~0) (<= main_~j~0 96) (<= main_~i~0 48)) (and (<= main_~j~0 44) (<= 22 main_~i~0) (<= main_~i~0 22) (<= 44 main_~j~0)) (and (<= main_~i~0 59) (<= 59 main_~i~0) (<= 118 main_~j~0) (<= main_~j~0 118)) (and (<= 150 main_~j~0) (<= main_~j~0 150) (<= main_~i~0 75) (<= 75 main_~i~0)) (and (<= 58 main_~j~0) (<= main_~j~0 58) (<= main_~i~0 29) (<= 29 main_~i~0)) (and (<= main_~i~0 16) (<= main_~j~0 32) (<= 16 main_~i~0) (<= 32 main_~j~0)) (and (<= 89 main_~i~0) (<= 178 main_~j~0) (<= main_~j~0 178) (<= main_~i~0 89)) (and (<= 30 main_~i~0) (<= main_~i~0 30) (<= main_~j~0 60) (<= 60 main_~j~0)) (and (<= 15 main_~i~0) (<= main_~j~0 30) (<= main_~i~0 15) (<= 30 main_~j~0)) (and (<= 33 main_~i~0) (<= main_~j~0 66) (<= 66 main_~j~0) (<= main_~i~0 33)) (and (<= main_~i~0 64) (<= main_~j~0 128) (<= 64 main_~i~0) (<= 128 main_~j~0)) (and (<= 97 main_~i~0) (<= main_~j~0 194) (<= 194 main_~j~0) (<= main_~i~0 97)) (and (<= main_~j~0 8) (<= main_~i~0 4) (<= 8 main_~j~0) (<= 4 main_~i~0)) (and (<= 9 main_~i~0) (<= 18 main_~j~0) (<= main_~i~0 9) (<= main_~j~0 18)) (and (<= main_~i~0 56) (<= 56 main_~i~0) (<= main_~j~0 112) (<= 112 main_~j~0)) (and (<= main_~j~0 10) (<= 10 main_~j~0) (<= main_~i~0 5) (<= 5 main_~i~0)) (and (<= main_~j~0 144) (<= main_~i~0 72) (<= 72 main_~i~0) (<= 144 main_~j~0)) (and (<= main_~i~0 49) (<= 49 main_~i~0) (<= 98 main_~j~0) (<= main_~j~0 98)) (and (<= main_~j~0 52) (<= 52 main_~j~0) (<= main_~i~0 26) (<= 26 main_~i~0)) (and (<= 2 main_~i~0) (<= 4 main_~j~0) (<= main_~j~0 4) (<= main_~i~0 2)) (and (<= main_~i~0 92) (<= 184 main_~j~0) (<= main_~j~0 184) (<= 92 main_~i~0)) (and (<= main_~i~0 60) (<= 120 main_~j~0) (<= main_~j~0 120) (<= 60 main_~i~0)) (and (<= 138 main_~j~0) (<= main_~j~0 138) (<= 69 main_~i~0) (<= main_~i~0 69)) (and (<= 19 main_~i~0) (<= main_~j~0 38) (<= main_~i~0 19) (<= 38 main_~j~0)) (and (<= main_~j~0 192) (<= main_~i~0 96) (<= 96 main_~i~0) (<= 192 main_~j~0)) (and (<= 58 main_~i~0) (<= main_~j~0 116) (<= 116 main_~j~0) (<= main_~i~0 58)) (and (<= 80 main_~i~0) (<= main_~i~0 80) (<= 160 main_~j~0) (<= main_~j~0 160)) (and (<= 114 main_~j~0) (<= main_~j~0 114) (<= main_~i~0 57) (<= 57 main_~i~0)) (and (<= 94 main_~i~0) (<= 188 main_~j~0) (<= main_~j~0 188) (<= main_~i~0 94)) (and (<= 108 main_~j~0) (<= main_~i~0 54) (<= main_~j~0 108) (<= 54 main_~i~0)) (and (<= 51 main_~i~0) (<= main_~i~0 51) (<= 102 main_~j~0) (<= main_~j~0 102)) (and (<= 164 main_~j~0) (<= main_~j~0 164) (<= 82 main_~i~0) (<= main_~i~0 82)) (and (<= 70 main_~j~0) (<= 35 main_~i~0) (<= main_~j~0 70) (<= main_~i~0 35)) (and (<= 64 main_~j~0) (<= main_~i~0 32) (<= main_~j~0 64) (<= 32 main_~i~0)) (and (<= 87 main_~i~0) (<= 174 main_~j~0) (<= main_~j~0 174) (<= main_~i~0 87)) (and (<= main_~i~0 76) (<= 152 main_~j~0) (<= main_~j~0 152) (<= 76 main_~i~0)) (and (<= main_~j~0 2) (<= main_~i~0 1) (<= 2 main_~j~0) (<= 1 main_~i~0)) (and (<= 83 main_~i~0) (<= main_~j~0 166) (<= main_~i~0 83) (<= 166 main_~j~0)) (and (<= main_~i~0 10) (<= 20 main_~j~0) (<= 10 main_~i~0) (<= main_~j~0 20)) (and (<= main_~i~0 41) (<= 82 main_~j~0) (<= 41 main_~i~0) (<= main_~j~0 82)) (and (<= main_~j~0 36) (<= main_~i~0 18) (<= 18 main_~i~0) (<= 36 main_~j~0)) (and (<= main_~i~0 27) (<= 54 main_~j~0) (<= main_~j~0 54) (<= 27 main_~i~0)) (and (<= 50 main_~j~0) (<= 25 main_~i~0) (<= main_~j~0 50) (<= main_~i~0 25)) (and (<= main_~j~0 86) (<= 86 main_~j~0) (<= main_~i~0 43) (<= 43 main_~i~0)) (and (<= 62 main_~i~0) (<= 124 main_~j~0) (<= main_~i~0 62) (<= main_~j~0 124)) (and (<= main_~j~0 142) (<= 142 main_~j~0) (<= main_~i~0 71) (<= 71 main_~i~0)) (and (<= 42 main_~i~0) (<= main_~i~0 42) (<= 84 main_~j~0) (<= main_~j~0 84)) (and (<= 14 main_~j~0) (<= main_~i~0 7) (<= main_~j~0 14) (<= 7 main_~i~0)) (and (<= main_~j~0 6) (<= 6 main_~j~0) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= main_~j~0 34) (<= 17 main_~i~0) (<= main_~i~0 17) (<= 34 main_~j~0)) (and (<= 40 main_~i~0) (<= 80 main_~j~0) (<= main_~i~0 40) (<= main_~j~0 80)) (and (<= main_~i~0 14) (<= 14 main_~i~0) (<= main_~j~0 28) (<= 28 main_~j~0)) (and (<= 88 main_~i~0) (<= 176 main_~j~0) (<= main_~j~0 176) (<= main_~i~0 88)) (and (<= main_~i~0 0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= main_~j~0 0)) (and (<= main_~i~0 70) (<= 70 main_~i~0) (<= main_~j~0 140) (<= 140 main_~j~0)) (and (<= 182 main_~j~0) (<= main_~i~0 91) (<= 91 main_~i~0) (<= main_~j~0 182)) (and (<= 24 main_~i~0) (<= main_~j~0 48) (<= main_~i~0 24) (<= 48 main_~j~0)) (and (<= main_~j~0 146) (<= 146 main_~j~0) (<= main_~i~0 73) (<= 73 main_~i~0)) (and (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~j~0 16) (<= 16 main_~j~0)) (and (<= 42 main_~j~0) (<= main_~j~0 42) (<= main_~i~0 21) (<= 21 main_~i~0)) (and (<= main_~j~0 122) (<= 61 main_~i~0) (<= main_~i~0 61) (<= 122 main_~j~0)) (and (<= main_~i~0 84) (<= 168 main_~j~0) (<= 84 main_~i~0) (<= main_~j~0 168)) (and (<= main_~j~0 110) (<= 110 main_~j~0) (<= main_~i~0 55) (<= 55 main_~i~0)) (and (<= main_~i~0 47) (<= main_~j~0 94) (<= 94 main_~j~0) (<= 47 main_~i~0)) (and (<= 170 main_~j~0) (<= 85 main_~i~0) (<= main_~i~0 85) (<= main_~j~0 170)) (and (<= main_~i~0 13) (<= 13 main_~i~0) (<= main_~j~0 26) (<= 26 main_~j~0))) [2022-04-06 21:13:32,187 INFO L878 garLoopResultBuilder]: At program point L23-3(lines 23 26) the Hoare annotation is: (and (<= main_~j~0 200) (< 199 main_~j~0)) [2022-04-06 21:13:32,187 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 29) the Hoare annotation is: true [2022-04-06 21:13:32,187 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:13:32,187 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 21:13:32,187 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:13:32,187 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:13:32,188 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 21:13:32,188 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 21:13:32,188 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:13:32,188 INFO L878 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 21:13:32,188 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 21:13:32,188 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 18) the Hoare annotation is: true [2022-04-06 21:13:32,188 INFO L885 garLoopResultBuilder]: At program point L15-2(lines 14 18) the Hoare annotation is: true [2022-04-06 21:13:32,188 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 18) the Hoare annotation is: true [2022-04-06 21:13:32,189 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 21:13:32,191 INFO L719 BasicCegarLoop]: Path program histogram: [202, 2] [2022-04-06 21:13:32,192 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 21:13:32,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:13:32 BoogieIcfgContainer [2022-04-06 21:13:32,247 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 21:13:32,247 INFO L158 Benchmark]: Toolchain (without parser) took 409652.14ms. Allocated memory was 186.6MB in the beginning and 241.2MB in the end (delta: 54.5MB). Free memory was 136.6MB in the beginning and 101.4MB in the end (delta: 35.3MB). Peak memory consumption was 124.8MB. Max. memory is 8.0GB. [2022-04-06 21:13:32,247 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 186.6MB. Free memory was 153.4MB in the beginning and 153.3MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 21:13:32,247 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.24ms. Allocated memory is still 186.6MB. Free memory was 136.4MB in the beginning and 163.0MB in the end (delta: -26.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 21:13:32,247 INFO L158 Benchmark]: Boogie Preprocessor took 31.84ms. Allocated memory is still 186.6MB. Free memory was 163.0MB in the beginning and 161.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 21:13:32,248 INFO L158 Benchmark]: RCFGBuilder took 290.87ms. Allocated memory is still 186.6MB. Free memory was 161.6MB in the beginning and 152.0MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 21:13:32,248 INFO L158 Benchmark]: TraceAbstraction took 409073.78ms. Allocated memory was 186.6MB in the beginning and 241.2MB in the end (delta: 54.5MB). Free memory was 151.5MB in the beginning and 101.4MB in the end (delta: 50.1MB). Peak memory consumption was 139.0MB. Max. memory is 8.0GB. [2022-04-06 21:13:32,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 186.6MB. Free memory was 153.4MB in the beginning and 153.3MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 250.24ms. Allocated memory is still 186.6MB. Free memory was 136.4MB in the beginning and 163.0MB in the end (delta: -26.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.84ms. Allocated memory is still 186.6MB. Free memory was 163.0MB in the beginning and 161.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 290.87ms. Allocated memory is still 186.6MB. Free memory was 161.6MB in the beginning and 152.0MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 409073.78ms. Allocated memory was 186.6MB in the beginning and 241.2MB in the end (delta: 54.5MB). Free memory was 151.5MB in the beginning and 101.4MB in the end (delta: 50.1MB). Peak memory consumption was 139.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 409.0s, OverallIterations: 102, TraceHistogramMax: 101, PathProgramHistogramMax: 202, EmptinessCheckTime: 0.0s, AutomataDifference: 140.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 718 SdHoareTripleChecker+Valid, 9.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 717 mSDsluCounter, 4251 SdHoareTripleChecker+Invalid, 8.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3026 mSDsCounter, 5745 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19674 IncrementalHoareTripleChecker+Invalid, 25419 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5745 mSolverCounterUnsat, 1225 mSDtfsCounter, 19674 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23316 GetRequests, 10150 SyntacticMatches, 55 SemanticMatches, 13111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183332 ImplicationChecksByTransitivity, 336.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=101, InterpolantAutomatonStates: 5560, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 102 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 20 LocationsWithAnnotation, 626 PreInvPairs, 935 NumberOfFragments, 1353 HoareAnnotationTreeSize, 626 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 20 FomulaSimplificationsInter, 5 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((38 <= i && 76 <= j) && i <= 38) && j <= 76) || (((j <= 88 && 88 <= j) && 44 <= i) && i <= 44)) || (((j <= 130 && 130 <= j) && 65 <= i) && i <= 65)) || (((i <= 53 && 53 <= i) && 106 <= j) && j <= 106)) || (((86 <= i && i <= 86) && 172 <= j) && j <= 172)) || (((i <= 93 && 93 <= i) && 186 <= j) && j <= 186)) || (((j <= 72 && 72 <= j) && 36 <= i) && i <= 36)) || (((j <= 12 && 12 <= j) && i <= 6) && 6 <= i)) || (((134 <= j && 67 <= i) && i <= 67) && j <= 134)) || (((90 <= i && j <= 180) && i <= 90) && 180 <= j)) || (((148 <= j && j <= 148) && 74 <= i) && i <= 74)) || (((39 <= i && 78 <= j) && i <= 39) && j <= 78)) || (((98 <= i && 196 <= j) && i <= 98) && j <= 196)) || (((23 <= i && i <= 23) && 46 <= j) && j <= 46)) || (((22 <= j && 11 <= i) && j <= 22) && i <= 11)) || (((77 <= i && i <= 77) && 154 <= j) && j <= 154)) || (((136 <= j && j <= 136) && 68 <= i) && i <= 68)) || (((132 <= j && i <= 66) && j <= 132) && 66 <= i)) || ((100 <= i && j <= 200) && 199 < j)) || (((j <= 190 && 190 <= j) && 95 <= i) && i <= 95)) || (((68 <= j && j <= 68) && i <= 34) && 34 <= i)) || (((j <= 92 && 46 <= i) && i <= 46) && 92 <= j)) || (((37 <= i && i <= 37) && j <= 74) && 74 <= j)) || (((20 <= i && j <= 40) && 40 <= j) && i <= 20)) || (((j <= 162 && i <= 81) && 162 <= j) && 81 <= i)) || (((52 <= i && i <= 52) && j <= 104) && 104 <= j)) || (((12 <= i && j <= 24) && i <= 12) && 24 <= j)) || (((31 <= i && i <= 31) && j <= 62) && 62 <= j)) || (((j <= 56 && i <= 28) && 28 <= i) && 56 <= j)) || (((j <= 90 && 90 <= j) && 45 <= i) && i <= 45)) || (((i <= 63 && j <= 126) && 126 <= j) && 63 <= i)) || (((i <= 79 && 158 <= j) && j <= 158) && 79 <= i)) || (((78 <= i && 156 <= j) && i <= 78) && j <= 156)) || (((j <= 198 && i <= 99) && 99 <= i) && 198 <= j)) || (((j <= 100 && 100 <= j) && i <= 50) && 50 <= i)) || (((96 <= j && 48 <= i) && j <= 96) && i <= 48)) || (((j <= 44 && 22 <= i) && i <= 22) && 44 <= j)) || (((i <= 59 && 59 <= i) && 118 <= j) && j <= 118)) || (((150 <= j && j <= 150) && i <= 75) && 75 <= i)) || (((58 <= j && j <= 58) && i <= 29) && 29 <= i)) || (((i <= 16 && j <= 32) && 16 <= i) && 32 <= j)) || (((89 <= i && 178 <= j) && j <= 178) && i <= 89)) || (((30 <= i && i <= 30) && j <= 60) && 60 <= j)) || (((15 <= i && j <= 30) && i <= 15) && 30 <= j)) || (((33 <= i && j <= 66) && 66 <= j) && i <= 33)) || (((i <= 64 && j <= 128) && 64 <= i) && 128 <= j)) || (((97 <= i && j <= 194) && 194 <= j) && i <= 97)) || (((j <= 8 && i <= 4) && 8 <= j) && 4 <= i)) || (((9 <= i && 18 <= j) && i <= 9) && j <= 18)) || (((i <= 56 && 56 <= i) && j <= 112) && 112 <= j)) || (((j <= 10 && 10 <= j) && i <= 5) && 5 <= i)) || (((j <= 144 && i <= 72) && 72 <= i) && 144 <= j)) || (((i <= 49 && 49 <= i) && 98 <= j) && j <= 98)) || (((j <= 52 && 52 <= j) && i <= 26) && 26 <= i)) || (((2 <= i && 4 <= j) && j <= 4) && i <= 2)) || (((i <= 92 && 184 <= j) && j <= 184) && 92 <= i)) || (((i <= 60 && 120 <= j) && j <= 120) && 60 <= i)) || (((138 <= j && j <= 138) && 69 <= i) && i <= 69)) || (((19 <= i && j <= 38) && i <= 19) && 38 <= j)) || (((j <= 192 && i <= 96) && 96 <= i) && 192 <= j)) || (((58 <= i && j <= 116) && 116 <= j) && i <= 58)) || (((80 <= i && i <= 80) && 160 <= j) && j <= 160)) || (((114 <= j && j <= 114) && i <= 57) && 57 <= i)) || (((94 <= i && 188 <= j) && j <= 188) && i <= 94)) || (((108 <= j && i <= 54) && j <= 108) && 54 <= i)) || (((51 <= i && i <= 51) && 102 <= j) && j <= 102)) || (((164 <= j && j <= 164) && 82 <= i) && i <= 82)) || (((70 <= j && 35 <= i) && j <= 70) && i <= 35)) || (((64 <= j && i <= 32) && j <= 64) && 32 <= i)) || (((87 <= i && 174 <= j) && j <= 174) && i <= 87)) || (((i <= 76 && 152 <= j) && j <= 152) && 76 <= i)) || (((j <= 2 && i <= 1) && 2 <= j) && 1 <= i)) || (((83 <= i && j <= 166) && i <= 83) && 166 <= j)) || (((i <= 10 && 20 <= j) && 10 <= i) && j <= 20)) || (((i <= 41 && 82 <= j) && 41 <= i) && j <= 82)) || (((j <= 36 && i <= 18) && 18 <= i) && 36 <= j)) || (((i <= 27 && 54 <= j) && j <= 54) && 27 <= i)) || (((50 <= j && 25 <= i) && j <= 50) && i <= 25)) || (((j <= 86 && 86 <= j) && i <= 43) && 43 <= i)) || (((62 <= i && 124 <= j) && i <= 62) && j <= 124)) || (((j <= 142 && 142 <= j) && i <= 71) && 71 <= i)) || (((42 <= i && i <= 42) && 84 <= j) && j <= 84)) || (((14 <= j && i <= 7) && j <= 14) && 7 <= i)) || (((j <= 6 && 6 <= j) && 3 <= i) && i <= 3)) || (((j <= 34 && 17 <= i) && i <= 17) && 34 <= j)) || (((40 <= i && 80 <= j) && i <= 40) && j <= 80)) || (((i <= 14 && 14 <= i) && j <= 28) && 28 <= j)) || (((88 <= i && 176 <= j) && j <= 176) && i <= 88)) || (((i <= 0 && 0 <= j) && 0 <= i) && j <= 0)) || (((i <= 70 && 70 <= i) && j <= 140) && 140 <= j)) || (((182 <= j && i <= 91) && 91 <= i) && j <= 182)) || (((24 <= i && j <= 48) && i <= 24) && 48 <= j)) || (((j <= 146 && 146 <= j) && i <= 73) && 73 <= i)) || (((8 <= i && i <= 8) && j <= 16) && 16 <= j)) || (((42 <= j && j <= 42) && i <= 21) && 21 <= i)) || (((j <= 122 && 61 <= i) && i <= 61) && 122 <= j)) || (((i <= 84 && 168 <= j) && 84 <= i) && j <= 168)) || (((j <= 110 && 110 <= j) && i <= 55) && 55 <= i)) || (((i <= 47 && j <= 94) && 94 <= j) && 47 <= i)) || (((170 <= j && 85 <= i) && i <= 85) && j <= 170)) || (((i <= 13 && 13 <= i) && j <= 26) && 26 <= j) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-04-06 21:13:32,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...