/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:50:18,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:50:18,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:50:18,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:50:18,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:50:18,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:50:18,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:50:18,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:50:18,414 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:50:18,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:50:18,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:50:18,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:50:18,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:50:18,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:50:18,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:50:18,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:50:18,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:50:18,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:50:18,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:50:18,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:50:18,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:50:18,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:50:18,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:50:18,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:50:18,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:50:18,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:50:18,417 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:50:18,417 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:50:18,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:50:18,417 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:50:18,418 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:50:18,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:50:18,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:50:18,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:50:18,628 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:50:18,629 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:50:18,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2022-04-06 20:50:18,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/223dee11b/5151e266431f4bae936dd68d328a25e5/FLAG2efa388eb [2022-04-06 20:50:18,963 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:50:18,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2022-04-06 20:50:18,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/223dee11b/5151e266431f4bae936dd68d328a25e5/FLAG2efa388eb [2022-04-06 20:50:19,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/223dee11b/5151e266431f4bae936dd68d328a25e5 [2022-04-06 20:50:19,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:50:19,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:50:19,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:50:19,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:50:19,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:50:19,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83dc997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19, skipping insertion in model container [2022-04-06 20:50:19,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:50:19,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:50:19,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334] [2022-04-06 20:50:19,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:50:19,576 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:50:19,584 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334] [2022-04-06 20:50:19,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:50:19,603 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:50:19,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19 WrapperNode [2022-04-06 20:50:19,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:50:19,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:50:19,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:50:19,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:50:19,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:50:19,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:50:19,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:50:19,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:50:19,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19" (1/1) ... [2022-04-06 20:50:19,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:50:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:19,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:50:19,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:50:19,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:50:19,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:50:19,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:50:19,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:50:19,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:50:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:50:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:50:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:50:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:50:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:50:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:50:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:50:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:50:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:50:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:50:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:50:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:50:19,758 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:50:19,759 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:50:19,897 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:50:19,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:50:19,902 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 20:50:19,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:50:19 BoogieIcfgContainer [2022-04-06 20:50:19,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:50:19,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:50:19,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:50:19,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:50:19,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:50:19" (1/3) ... [2022-04-06 20:50:19,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6671b655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:50:19, skipping insertion in model container [2022-04-06 20:50:19,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:50:19" (2/3) ... [2022-04-06 20:50:19,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6671b655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:50:19, skipping insertion in model container [2022-04-06 20:50:19,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:50:19" (3/3) ... [2022-04-06 20:50:19,924 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2022-04-06 20:50:19,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:50:19,927 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:50:19,972 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:50:19,977 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:50:19,977 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:50:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 20:50:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:50:19,994 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:19,994 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:19,995 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times [2022-04-06 20:50:20,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881791133] [2022-04-06 20:50:20,014 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:50:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 2 times [2022-04-06 20:50:20,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:20,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455149536] [2022-04-06 20:50:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:20,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:20,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:20,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455149536] [2022-04-06 20:50:20,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455149536] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:20,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:20,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:50:20,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:20,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881791133] [2022-04-06 20:50:20,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881791133] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:20,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:20,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:50:20,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993172121] [2022-04-06 20:50:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:20,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:50:20,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:50:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:50:20,205 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:20,263 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-04-06 20:50:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:50:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-04-06 20:50:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:20,270 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:50:20,271 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:50:20,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:50:20,276 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:20,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:50:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:50:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 20:50:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-04-06 20:50:20,313 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-04-06 20:50:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:20,314 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-04-06 20:50:20,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-04-06 20:50:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:50:20,316 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:20,316 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:20,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:50:20,317 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:20,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times [2022-04-06 20:50:20,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [268802961] [2022-04-06 20:50:20,318 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:50:20,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 2 times [2022-04-06 20:50:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:20,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817459398] [2022-04-06 20:50:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:20,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:20,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:20,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817459398] [2022-04-06 20:50:20,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817459398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:20,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:20,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:50:20,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:20,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [268802961] [2022-04-06 20:50:20,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [268802961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:20,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:20,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:50:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018421365] [2022-04-06 20:50:20,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:20,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:50:20,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:50:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:50:20,436 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:20,512 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-04-06 20:50:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:50:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-04-06 20:50:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:20,513 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:50:20,513 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:50:20,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:50:20,514 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:20,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:20,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:50:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-04-06 20:50:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-04-06 20:50:20,520 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-04-06 20:50:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:20,520 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-04-06 20:50:20,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-04-06 20:50:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 20:50:20,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:20,523 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:20,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:50:20,524 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:20,524 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times [2022-04-06 20:50:20,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [659415874] [2022-04-06 20:50:20,525 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:50:20,525 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 2 times [2022-04-06 20:50:20,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:20,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180628058] [2022-04-06 20:50:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:20,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:20,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:20,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180628058] [2022-04-06 20:50:20,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180628058] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:20,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:20,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:50:20,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:20,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [659415874] [2022-04-06 20:50:20,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [659415874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:20,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:20,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:50:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520847836] [2022-04-06 20:50:20,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:20,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:50:20,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:50:20,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:50:20,585 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:20,631 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-04-06 20:50:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:50:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 20:50:20,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:20,632 INFO L225 Difference]: With dead ends: 39 [2022-04-06 20:50:20,632 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 20:50:20,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:50:20,633 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:20,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:50:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 20:50:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-04-06 20:50:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-04-06 20:50:20,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-04-06 20:50:20,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:20,638 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-04-06 20:50:20,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:20,638 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-04-06 20:50:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 20:50:20,639 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:20,639 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:20,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:50:20,639 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times [2022-04-06 20:50:20,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [840373823] [2022-04-06 20:50:20,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:50:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 2 times [2022-04-06 20:50:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:20,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211893200] [2022-04-06 20:50:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:20,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:20,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:20,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211893200] [2022-04-06 20:50:20,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211893200] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:20,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:20,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:50:20,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:20,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [840373823] [2022-04-06 20:50:20,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [840373823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:20,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:20,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:50:20,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395060740] [2022-04-06 20:50:20,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:20,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:50:20,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:50:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:50:20,717 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 20:50:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:20,775 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-04-06 20:50:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:50:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 20:50:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:20,776 INFO L225 Difference]: With dead ends: 39 [2022-04-06 20:50:20,776 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 20:50:20,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:50:20,777 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:20,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:50:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 20:50:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-06 20:50:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-04-06 20:50:20,782 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-04-06 20:50:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:20,782 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-04-06 20:50:20,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 20:50:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-04-06 20:50:20,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:50:20,783 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:20,783 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:20,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:50:20,783 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times [2022-04-06 20:50:20,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477757189] [2022-04-06 20:50:20,803 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:20,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 2 times [2022-04-06 20:50:20,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:20,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787602945] [2022-04-06 20:50:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:20,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,860 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 20:50:20,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787602945] [2022-04-06 20:50:20,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787602945] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:20,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218822559] [2022-04-06 20:50:20,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:20,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:20,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:20,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:20,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:50:20,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:20,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:20,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:50:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:20,972 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 20:50:20,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:21,041 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 20:50:21,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218822559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:21,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:21,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 20:50:21,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477757189] [2022-04-06 20:50:21,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477757189] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:21,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:21,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:50:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953382892] [2022-04-06 20:50:21,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:21,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:50:21,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:50:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:50:21,043 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:21,102 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-04-06 20:50:21,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:50:21,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 20:50:21,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:21,105 INFO L225 Difference]: With dead ends: 41 [2022-04-06 20:50:21,105 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 20:50:21,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:50:21,106 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:21,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:50:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 20:50:21,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-04-06 20:50:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-04-06 20:50:21,111 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2022-04-06 20:50:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:21,111 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-04-06 20:50:21,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-04-06 20:50:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:50:21,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:21,112 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:21,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:21,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:21,325 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:21,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1415616702, now seen corresponding path program 3 times [2022-04-06 20:50:21,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:21,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [121160369] [2022-04-06 20:50:21,327 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:21,327 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1415616702, now seen corresponding path program 4 times [2022-04-06 20:50:21,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:21,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265286506] [2022-04-06 20:50:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:21,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:21,397 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 20:50:21,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:21,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265286506] [2022-04-06 20:50:21,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265286506] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:21,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566980591] [2022-04-06 20:50:21,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:21,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:21,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:21,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:21,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:50:21,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:21,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:21,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:50:21,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:21,497 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 20:50:21,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:21,541 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 20:50:21,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566980591] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:21,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:21,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:50:21,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:21,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [121160369] [2022-04-06 20:50:21,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [121160369] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:21,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:21,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:50:21,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407175305] [2022-04-06 20:50:21,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:21,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:50:21,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:50:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:50:21,544 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:21,605 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-04-06 20:50:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:50:21,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 20:50:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:21,607 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:50:21,607 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:50:21,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:50:21,608 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:21,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:50:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:50:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-06 20:50:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-04-06 20:50:21,613 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2022-04-06 20:50:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:21,613 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-04-06 20:50:21,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-04-06 20:50:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:50:21,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:21,614 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:21,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:21,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 20:50:21,833 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash -908142238, now seen corresponding path program 5 times [2022-04-06 20:50:21,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:21,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78174011] [2022-04-06 20:50:21,835 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:21,835 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash -908142238, now seen corresponding path program 6 times [2022-04-06 20:50:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:21,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326325738] [2022-04-06 20:50:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:21,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:21,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:21,914 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 20:50:21,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:21,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326325738] [2022-04-06 20:50:21,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326325738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:21,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145558683] [2022-04-06 20:50:21,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:21,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:21,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:21,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:21,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:50:21,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:21,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:21,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:50:21,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:22,010 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 20:50:22,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:22,099 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 20:50:22,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145558683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:22,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:22,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:50:22,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:22,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78174011] [2022-04-06 20:50:22,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78174011] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:22,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:22,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:50:22,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253584287] [2022-04-06 20:50:22,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:22,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:50:22,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:50:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:50:22,104 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:22,199 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-04-06 20:50:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:50:22,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 20:50:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:22,200 INFO L225 Difference]: With dead ends: 45 [2022-04-06 20:50:22,200 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:50:22,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:50:22,201 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:22,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 43 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:50:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:50:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-06 20:50:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-04-06 20:50:22,206 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2022-04-06 20:50:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:22,206 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-04-06 20:50:22,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-06 20:50:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:50:22,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:22,207 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:22,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:22,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:22,423 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1938664258, now seen corresponding path program 7 times [2022-04-06 20:50:22,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:22,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [16021142] [2022-04-06 20:50:22,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:22,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1938664258, now seen corresponding path program 8 times [2022-04-06 20:50:22,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:22,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70005112] [2022-04-06 20:50:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:22,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:22,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:22,506 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 20:50:22,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70005112] [2022-04-06 20:50:22,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70005112] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527526386] [2022-04-06 20:50:22,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:22,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:22,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:22,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:50:22,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:22,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:50:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:22,602 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 20:50:22,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:22,673 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 20:50:22,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527526386] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:22,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:22,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 20:50:22,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:22,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [16021142] [2022-04-06 20:50:22,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [16021142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:22,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:22,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:50:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088662122] [2022-04-06 20:50:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:22,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:50:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:50:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:50:22,676 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 20:50:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:22,770 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-04-06 20:50:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:50:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 20:50:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:22,771 INFO L225 Difference]: With dead ends: 47 [2022-04-06 20:50:22,771 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:50:22,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:50:22,772 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:22,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:50:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 20:50:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-06 20:50:22,776 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2022-04-06 20:50:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:22,776 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-06 20:50:22,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 20:50:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-06 20:50:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:50:22,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:22,777 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:22,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:22,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:22,983 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:22,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash -4647582, now seen corresponding path program 9 times [2022-04-06 20:50:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:22,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1672859588] [2022-04-06 20:50:22,985 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:22,985 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:22,985 INFO L85 PathProgramCache]: Analyzing trace with hash -4647582, now seen corresponding path program 10 times [2022-04-06 20:50:22,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:22,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482698861] [2022-04-06 20:50:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:22,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:23,070 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 20:50:23,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482698861] [2022-04-06 20:50:23,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482698861] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641475989] [2022-04-06 20:50:23,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:23,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:23,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:23,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:23,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:50:23,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:23,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:50:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:23,164 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 20:50:23,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:23,269 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 20:50:23,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641475989] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:23,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:23,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:50:23,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:23,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1672859588] [2022-04-06 20:50:23,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1672859588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:23,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:23,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:50:23,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265462195] [2022-04-06 20:50:23,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:23,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:50:23,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:23,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:50:23,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:50:23,271 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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 20:50:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:23,381 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-04-06 20:50:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:50:23,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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 20:50:23,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:23,382 INFO L225 Difference]: With dead ends: 49 [2022-04-06 20:50:23,382 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 20:50:23,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:50:23,383 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:23,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 20:50:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 20:50:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-04-06 20:50:23,387 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2022-04-06 20:50:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:23,388 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-04-06 20:50:23,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 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 20:50:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-04-06 20:50:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:50:23,388 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:23,388 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:23,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:23,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:23,600 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash -117772478, now seen corresponding path program 11 times [2022-04-06 20:50:23,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:23,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [598156871] [2022-04-06 20:50:23,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:23,602 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:23,602 INFO L85 PathProgramCache]: Analyzing trace with hash -117772478, now seen corresponding path program 12 times [2022-04-06 20:50:23,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:23,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505195697] [2022-04-06 20:50:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:23,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:23,713 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 20:50:23,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:23,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505195697] [2022-04-06 20:50:23,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505195697] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:23,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373362694] [2022-04-06 20:50:23,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:23,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:23,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:23,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:23,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:50:23,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:50:23,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:23,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:50:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:23,814 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 20:50:23,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:23,947 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 20:50:23,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373362694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:23,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:23,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:50:23,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:23,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [598156871] [2022-04-06 20:50:23,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [598156871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:23,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:23,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:50:23,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753980317] [2022-04-06 20:50:23,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:23,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:50:23,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:50:23,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:50:23,949 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:24,095 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-04-06 20:50:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:50:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 20:50:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:24,095 INFO L225 Difference]: With dead ends: 51 [2022-04-06 20:50:24,095 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 20:50:24,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:50:24,097 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:24,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 20:50:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-04-06 20:50:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-04-06 20:50:24,110 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2022-04-06 20:50:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:24,110 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-04-06 20:50:24,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-04-06 20:50:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:50:24,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:24,111 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:24,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 20:50:24,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:24,328 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash 670323042, now seen corresponding path program 13 times [2022-04-06 20:50:24,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:24,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1471242479] [2022-04-06 20:50:24,329 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:24,329 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:24,329 INFO L85 PathProgramCache]: Analyzing trace with hash 670323042, now seen corresponding path program 14 times [2022-04-06 20:50:24,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:24,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142352094] [2022-04-06 20:50:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:24,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:24,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:24,445 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 20:50:24,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:24,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142352094] [2022-04-06 20:50:24,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142352094] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:24,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128133383] [2022-04-06 20:50:24,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:24,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:24,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:24,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:24,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:50:24,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:24,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:50:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:24,552 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 20:50:24,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:24,713 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 20:50:24,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128133383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:24,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:24,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:50:24,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:24,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1471242479] [2022-04-06 20:50:24,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1471242479] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:24,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:24,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:50:24,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61912032] [2022-04-06 20:50:24,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:24,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:50:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:50:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:50:24,715 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 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 20:50:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:24,890 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-04-06 20:50:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:50:24,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 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 20:50:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:24,891 INFO L225 Difference]: With dead ends: 53 [2022-04-06 20:50:24,891 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 20:50:24,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:50:24,892 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:24,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 63 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 20:50:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-06 20:50:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-06 20:50:24,896 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-04-06 20:50:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:24,896 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-06 20:50:24,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 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 20:50:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-06 20:50:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:50:24,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:24,897 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:24,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:25,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:25,104 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash -668519614, now seen corresponding path program 15 times [2022-04-06 20:50:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:25,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1971256459] [2022-04-06 20:50:25,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:25,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -668519614, now seen corresponding path program 16 times [2022-04-06 20:50:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:25,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793119125] [2022-04-06 20:50:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:25,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:25,211 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 20:50:25,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793119125] [2022-04-06 20:50:25,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793119125] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936247400] [2022-04-06 20:50:25,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:25,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:25,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:25,212 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:25,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:50:25,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:25,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:25,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:50:25,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:25,362 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 20:50:25,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:50:25,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936247400] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:25,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:25,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 8] total 19 [2022-04-06 20:50:25,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1971256459] [2022-04-06 20:50:25,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1971256459] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:25,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:25,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:50:25,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000121776] [2022-04-06 20:50:25,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:25,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:50:25,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:50:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:50:25,467 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:25,656 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-04-06 20:50:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:50:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 20:50:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:25,657 INFO L225 Difference]: With dead ends: 55 [2022-04-06 20:50:25,657 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:50:25,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:50:25,658 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:25,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:50:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-04-06 20:50:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-04-06 20:50:25,661 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2022-04-06 20:50:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:25,662 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-04-06 20:50:25,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-04-06 20:50:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:50:25,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:25,662 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:25,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:25,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 20:50:25,872 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:25,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:25,872 INFO L85 PathProgramCache]: Analyzing trace with hash 777031010, now seen corresponding path program 17 times [2022-04-06 20:50:25,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:25,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1984686087] [2022-04-06 20:50:25,873 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:25,873 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 777031010, now seen corresponding path program 18 times [2022-04-06 20:50:25,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:25,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063559531] [2022-04-06 20:50:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:25,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:25,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:25,982 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 20:50:25,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:25,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063559531] [2022-04-06 20:50:25,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063559531] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:25,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489754916] [2022-04-06 20:50:25,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:25,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:25,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:25,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:25,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:50:26,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:50:26,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:50:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:26,098 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 20:50:26,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:26,469 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 20:50:26,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489754916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:26,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:26,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 27 [2022-04-06 20:50:26,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:26,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1984686087] [2022-04-06 20:50:26,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1984686087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:26,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:26,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:50:26,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572293026] [2022-04-06 20:50:26,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:26,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:50:26,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:50:26,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:50:26,471 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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 20:50:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:26,670 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-06 20:50:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:50:26,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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 20:50:26,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:26,670 INFO L225 Difference]: With dead ends: 57 [2022-04-06 20:50:26,670 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 20:50:26,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=994, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:50:26,672 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:26,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 20:50:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-06 20:50:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-04-06 20:50:26,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2022-04-06 20:50:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:26,675 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-04-06 20:50:26,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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 20:50:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-04-06 20:50:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:50:26,676 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:26,676 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:26,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:26,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:50:26,883 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1655539902, now seen corresponding path program 19 times [2022-04-06 20:50:26,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:26,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1496394537] [2022-04-06 20:50:26,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:26,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:26,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1655539902, now seen corresponding path program 20 times [2022-04-06 20:50:26,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:26,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927226313] [2022-04-06 20:50:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:26,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,007 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 20:50:27,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:27,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927226313] [2022-04-06 20:50:27,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927226313] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:27,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041123625] [2022-04-06 20:50:27,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:27,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:27,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:27,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:27,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:50:27,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:27,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:50:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:27,109 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 20:50:27,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:27,348 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 20:50:27,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041123625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:27,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:27,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:50:27,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1496394537] [2022-04-06 20:50:27,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1496394537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:27,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:27,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:50:27,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307215032] [2022-04-06 20:50:27,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:27,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:50:27,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:27,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:50:27,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:50:27,350 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:27,584 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-04-06 20:50:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:50:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:50:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:27,585 INFO L225 Difference]: With dead ends: 59 [2022-04-06 20:50:27,585 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 20:50:27,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:50:27,586 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:27,586 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 73 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 20:50:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-06 20:50:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-06 20:50:27,589 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 23 [2022-04-06 20:50:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:27,590 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-06 20:50:27,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-06 20:50:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:50:27,590 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:27,590 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:27,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:27,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:50:27,791 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:27,791 INFO L85 PathProgramCache]: Analyzing trace with hash 244173154, now seen corresponding path program 21 times [2022-04-06 20:50:27,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:27,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1728243549] [2022-04-06 20:50:27,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:27,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash 244173154, now seen corresponding path program 22 times [2022-04-06 20:50:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:27,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462294588] [2022-04-06 20:50:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:27,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,928 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 20:50:27,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:27,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462294588] [2022-04-06 20:50:27,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462294588] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:27,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704426330] [2022-04-06 20:50:27,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:27,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:27,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:27,929 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:27,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:50:27,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:27,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:27,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:50:27,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:28,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:28,303 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 20:50:28,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704426330] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:28,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:28,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:50:28,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:28,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1728243549] [2022-04-06 20:50:28,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1728243549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:28,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:28,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:50:28,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631292202] [2022-04-06 20:50:28,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:28,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:50:28,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:50:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:50:28,305 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 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 20:50:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:28,540 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-04-06 20:50:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:50:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 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 20:50:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:28,541 INFO L225 Difference]: With dead ends: 61 [2022-04-06 20:50:28,541 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 20:50:28,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:50:28,541 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:28,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 20:50:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 20:50:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-06 20:50:28,545 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2022-04-06 20:50:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:28,545 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-06 20:50:28,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 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 20:50:28,545 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-06 20:50:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:50:28,546 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:28,546 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:28,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:28,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:50:28,759 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash -994264254, now seen corresponding path program 23 times [2022-04-06 20:50:28,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1215984120] [2022-04-06 20:50:28,760 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:28,761 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash -994264254, now seen corresponding path program 24 times [2022-04-06 20:50:28,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:28,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571480761] [2022-04-06 20:50:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:28,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:28,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:28,922 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 20:50:28,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:28,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571480761] [2022-04-06 20:50:28,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571480761] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:28,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377205997] [2022-04-06 20:50:28,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:28,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:28,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:28,923 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:28,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:50:28,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:50:28,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:28,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:50:28,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:29,069 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 20:50:29,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:29,383 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 20:50:29,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377205997] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:29,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:29,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:50:29,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:29,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1215984120] [2022-04-06 20:50:29,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1215984120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:29,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:29,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:50:29,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989030825] [2022-04-06 20:50:29,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:29,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:50:29,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:29,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:50:29,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:50:29,385 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:29,595 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-04-06 20:50:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:50:29,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:50:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:29,596 INFO L225 Difference]: With dead ends: 63 [2022-04-06 20:50:29,596 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:50:29,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1309, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:50:29,597 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:29,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:50:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 20:50:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-04-06 20:50:29,601 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 25 [2022-04-06 20:50:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:29,601 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-04-06 20:50:29,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-06 20:50:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:50:29,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:29,602 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:29,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:29,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 20:50:29,806 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:29,806 INFO L85 PathProgramCache]: Analyzing trace with hash -731118238, now seen corresponding path program 25 times [2022-04-06 20:50:29,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:29,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1612637608] [2022-04-06 20:50:29,807 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:29,807 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash -731118238, now seen corresponding path program 26 times [2022-04-06 20:50:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:29,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186095216] [2022-04-06 20:50:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:29,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:29,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:29,963 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 20:50:29,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:29,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186095216] [2022-04-06 20:50:29,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186095216] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:29,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372122650] [2022-04-06 20:50:29,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:29,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:29,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:29,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:50:29,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:29,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:50:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:30,076 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 20:50:30,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:30,391 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 20:50:30,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372122650] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:30,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:30,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:50:30,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:30,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1612637608] [2022-04-06 20:50:30,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1612637608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:30,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:30,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:50:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183189094] [2022-04-06 20:50:30,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:30,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:50:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:50:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:50:30,392 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 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 20:50:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:30,655 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-04-06 20:50:30,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:50:30,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 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 20:50:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:30,656 INFO L225 Difference]: With dead ends: 65 [2022-04-06 20:50:30,656 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:50:30,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:50:30,657 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:30,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:50:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-04-06 20:50:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-04-06 20:50:30,664 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2022-04-06 20:50:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:30,664 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-04-06 20:50:30,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 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 20:50:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-04-06 20:50:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:50:30,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:30,664 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:30,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:30,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 20:50:30,867 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:30,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1163526334, now seen corresponding path program 27 times [2022-04-06 20:50:30,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:30,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1537444509] [2022-04-06 20:50:30,876 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:30,877 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1163526334, now seen corresponding path program 28 times [2022-04-06 20:50:30,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:30,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772359305] [2022-04-06 20:50:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:30,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:31,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:31,078 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 20:50:31,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:31,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772359305] [2022-04-06 20:50:31,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772359305] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:31,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565541873] [2022-04-06 20:50:31,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:31,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:31,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:31,079 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:31,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:50:31,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:31,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:50:31,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:31,208 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 20:50:31,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:31,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565541873] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:31,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:31,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:50:31,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1537444509] [2022-04-06 20:50:31,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1537444509] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:31,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:31,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:50:31,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487405524] [2022-04-06 20:50:31,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:31,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:50:31,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:50:31,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:50:31,604 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:31,901 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-04-06 20:50:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:50:31,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:50:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:31,902 INFO L225 Difference]: With dead ends: 67 [2022-04-06 20:50:31,902 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:50:31,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=633, Invalid=1719, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:50:31,903 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:31,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:50:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-04-06 20:50:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-04-06 20:50:31,907 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2022-04-06 20:50:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:31,907 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-04-06 20:50:31,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-04-06 20:50:31,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:50:31,908 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:31,908 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:31,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:32,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:32,124 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:32,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:32,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1683275422, now seen corresponding path program 29 times [2022-04-06 20:50:32,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:32,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [737327421] [2022-04-06 20:50:32,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:32,125 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:32,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1683275422, now seen corresponding path program 30 times [2022-04-06 20:50:32,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:32,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273891572] [2022-04-06 20:50:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:32,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:32,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:32,343 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 20:50:32,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273891572] [2022-04-06 20:50:32,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273891572] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667250509] [2022-04-06 20:50:32,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:32,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:32,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:32,346 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:32,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:50:32,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:50:32,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:32,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:50:32,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:32,613 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 20:50:32,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:33,341 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 20:50:33,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667250509] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:33,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:33,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 39 [2022-04-06 20:50:33,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:33,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [737327421] [2022-04-06 20:50:33,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [737327421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:33,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:33,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:50:33,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315189395] [2022-04-06 20:50:33,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:33,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:50:33,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:50:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:50:33,345 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 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 20:50:33,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:33,636 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-04-06 20:50:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:50:33,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 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 20:50:33,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:33,646 INFO L225 Difference]: With dead ends: 69 [2022-04-06 20:50:33,646 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 20:50:33,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=725, Invalid=2245, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:50:33,647 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:33,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 20:50:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-04-06 20:50:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-04-06 20:50:33,653 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2022-04-06 20:50:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:33,653 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-04-06 20:50:33,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 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 20:50:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-04-06 20:50:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:50:33,654 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:33,654 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:33,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:33,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:33,857 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:33,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:33,858 INFO L85 PathProgramCache]: Analyzing trace with hash -615627966, now seen corresponding path program 31 times [2022-04-06 20:50:33,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:33,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2141230128] [2022-04-06 20:50:33,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:33,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:33,859 INFO L85 PathProgramCache]: Analyzing trace with hash -615627966, now seen corresponding path program 32 times [2022-04-06 20:50:33,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:33,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232788160] [2022-04-06 20:50:33,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:33,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:34,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:34,100 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 20:50:34,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232788160] [2022-04-06 20:50:34,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232788160] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132474184] [2022-04-06 20:50:34,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:34,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:34,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:34,102 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:34,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:50:34,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:34,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:34,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:50:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:34,297 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 20:50:34,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:50:34,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132474184] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:34,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:34,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 8] total 27 [2022-04-06 20:50:34,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:34,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2141230128] [2022-04-06 20:50:34,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2141230128] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:34,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:34,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:50:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833208655] [2022-04-06 20:50:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:34,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:50:34,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:50:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:50:34,467 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:34,869 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2022-04-06 20:50:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:50:34,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:50:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:34,870 INFO L225 Difference]: With dead ends: 71 [2022-04-06 20:50:34,870 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:50:34,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:50:34,871 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:34,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:50:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-04-06 20:50:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-04-06 20:50:34,876 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2022-04-06 20:50:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:34,876 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-04-06 20:50:34,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-04-06 20:50:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:50:34,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:34,877 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:34,901 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 20:50:35,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:35,088 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1878295198, now seen corresponding path program 33 times [2022-04-06 20:50:35,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:35,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229153285] [2022-04-06 20:50:35,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:35,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1878295198, now seen corresponding path program 34 times [2022-04-06 20:50:35,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:35,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109128822] [2022-04-06 20:50:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:35,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:35,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:35,366 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 20:50:35,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109128822] [2022-04-06 20:50:35,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109128822] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185711420] [2022-04-06 20:50:35,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:35,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:35,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:35,367 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:35,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:50:35,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:35,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:35,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:50:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:35,517 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 20:50:35,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:36,109 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 20:50:36,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185711420] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:36,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:36,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:50:36,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229153285] [2022-04-06 20:50:36,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229153285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:36,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:36,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:50:36,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523011078] [2022-04-06 20:50:36,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:36,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:50:36,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:36,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:50:36,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1123, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:50:36,112 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 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 20:50:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:36,505 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-04-06 20:50:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:50:36,506 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 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 20:50:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:36,506 INFO L225 Difference]: With dead ends: 73 [2022-04-06 20:50:36,506 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 20:50:36,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=867, Invalid=2439, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:50:36,518 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:36,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:36,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 20:50:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-04-06 20:50:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-04-06 20:50:36,523 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2022-04-06 20:50:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:36,528 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-04-06 20:50:36,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 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 20:50:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-04-06 20:50:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:50:36,528 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:36,529 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:36,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:36,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:36,740 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1928693570, now seen corresponding path program 35 times [2022-04-06 20:50:36,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:36,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [991025743] [2022-04-06 20:50:36,741 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:36,741 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1928693570, now seen corresponding path program 36 times [2022-04-06 20:50:36,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:36,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758300849] [2022-04-06 20:50:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:36,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:37,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:37,038 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 20:50:37,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:37,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758300849] [2022-04-06 20:50:37,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758300849] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:37,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305375424] [2022-04-06 20:50:37,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:37,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:37,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:37,040 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:37,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:50:37,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:50:37,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:50:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:37,371 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 20:50:37,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:37,990 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 20:50:37,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305375424] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:37,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:37,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:50:37,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:37,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [991025743] [2022-04-06 20:50:37,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [991025743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:37,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:37,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:50:37,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867893576] [2022-04-06 20:50:37,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:37,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:50:37,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:37,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:50:37,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=1242, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:50:37,992 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:38,358 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-04-06 20:50:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:50:38,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:50:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:38,359 INFO L225 Difference]: With dead ends: 75 [2022-04-06 20:50:38,359 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 20:50:38,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=953, Invalid=2707, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:50:38,360 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:38,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 20:50:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-04-06 20:50:38,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-04-06 20:50:38,364 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 31 [2022-04-06 20:50:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:38,364 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-04-06 20:50:38,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-04-06 20:50:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:50:38,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:38,365 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:38,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:38,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:38,571 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash -313738910, now seen corresponding path program 37 times [2022-04-06 20:50:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:38,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1163568248] [2022-04-06 20:50:38,572 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:38,572 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -313738910, now seen corresponding path program 38 times [2022-04-06 20:50:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597432404] [2022-04-06 20:50:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:38,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:38,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:38,887 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 20:50:38,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597432404] [2022-04-06 20:50:38,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597432404] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176528640] [2022-04-06 20:50:38,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:38,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:38,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:38,889 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:38,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:50:38,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:38,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:38,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:50:38,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:39,047 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 20:50:39,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:39,698 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 20:50:39,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176528640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:39,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:39,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:50:39,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:39,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1163568248] [2022-04-06 20:50:39,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1163568248] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:39,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:39,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:50:39,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087127869] [2022-04-06 20:50:39,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:39,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:50:39,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:50:39,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1367, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:50:39,700 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 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 20:50:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:40,173 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-04-06 20:50:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:50:40,174 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 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 20:50:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:40,174 INFO L225 Difference]: With dead ends: 77 [2022-04-06 20:50:40,174 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 20:50:40,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1043, Invalid=2989, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:50:40,176 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:40,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 63 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 20:50:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-06 20:50:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-04-06 20:50:40,179 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2022-04-06 20:50:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:40,179 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-04-06 20:50:40,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 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 20:50:40,183 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-04-06 20:50:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:50:40,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:40,183 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:40,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:40,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:40,387 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1109669054, now seen corresponding path program 39 times [2022-04-06 20:50:40,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:40,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1512441521] [2022-04-06 20:50:40,388 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:40,388 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1109669054, now seen corresponding path program 40 times [2022-04-06 20:50:40,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:40,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728162374] [2022-04-06 20:50:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:40,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:40,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:40,672 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 20:50:40,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:40,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728162374] [2022-04-06 20:50:40,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728162374] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954170201] [2022-04-06 20:50:40,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:40,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:40,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:40,674 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:40,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:50:40,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:40,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:40,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:50:40,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:40,818 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 20:50:40,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:41,465 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 20:50:41,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954170201] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:41,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:41,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:50:41,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1512441521] [2022-04-06 20:50:41,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1512441521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:41,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:41,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:50:41,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043697628] [2022-04-06 20:50:41,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:41,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:50:41,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:41,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:50:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:50:41,467 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:41,966 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-04-06 20:50:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:50:41,966 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:50:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:41,967 INFO L225 Difference]: With dead ends: 79 [2022-04-06 20:50:41,967 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:50:41,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1137, Invalid=3285, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:50:41,969 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:41,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 113 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:50:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-04-06 20:50:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-04-06 20:50:41,974 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 33 [2022-04-06 20:50:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:41,974 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-04-06 20:50:41,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-04-06 20:50:41,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:50:41,975 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:41,975 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:41,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:42,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-04-06 20:50:42,194 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash -13699742, now seen corresponding path program 41 times [2022-04-06 20:50:42,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:42,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358150058] [2022-04-06 20:50:42,195 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:42,195 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash -13699742, now seen corresponding path program 42 times [2022-04-06 20:50:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:42,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434136576] [2022-04-06 20:50:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:42,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:42,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:42,520 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 20:50:42,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:42,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434136576] [2022-04-06 20:50:42,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434136576] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:42,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128455964] [2022-04-06 20:50:42,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:42,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:42,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:42,521 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:42,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:50:42,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 20:50:42,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:42,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:50:42,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:42,770 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 20:50:42,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:43,502 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 20:50:43,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128455964] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:43,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:43,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:50:43,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:43,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358150058] [2022-04-06 20:50:43,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358150058] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:43,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:43,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:50:43,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913221465] [2022-04-06 20:50:43,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:43,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:50:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:43,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:50:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1635, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:50:43,505 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 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 20:50:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:44,034 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-04-06 20:50:44,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:50:44,035 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 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 20:50:44,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:44,035 INFO L225 Difference]: With dead ends: 81 [2022-04-06 20:50:44,035 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 20:50:44,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1235, Invalid=3595, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:50:44,037 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:44,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 68 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 20:50:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-04-06 20:50:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-04-06 20:50:44,040 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2022-04-06 20:50:44,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:44,040 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-04-06 20:50:44,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 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 20:50:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-04-06 20:50:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:50:44,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:44,041 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:44,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:44,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 20:50:44,255 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:44,255 INFO L85 PathProgramCache]: Analyzing trace with hash -398389438, now seen corresponding path program 43 times [2022-04-06 20:50:44,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [850962651] [2022-04-06 20:50:44,256 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:44,256 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash -398389438, now seen corresponding path program 44 times [2022-04-06 20:50:44,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:44,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996164252] [2022-04-06 20:50:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:44,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:44,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:44,576 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 20:50:44,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:44,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996164252] [2022-04-06 20:50:44,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996164252] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:44,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711621935] [2022-04-06 20:50:44,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:44,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:44,577 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:44,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:50:44,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:44,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:44,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:50:44,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:44,753 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 20:50:44,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:45,516 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 20:50:45,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711621935] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:45,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:45,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:50:45,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:45,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [850962651] [2022-04-06 20:50:45,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [850962651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:45,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:45,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:50:45,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634724548] [2022-04-06 20:50:45,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:45,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:50:45,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:45,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:50:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:50:45,518 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:46,082 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-04-06 20:50:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:50:46,083 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:50:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:46,083 INFO L225 Difference]: With dead ends: 83 [2022-04-06 20:50:46,083 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:50:46,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1337, Invalid=3919, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:50:46,085 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:46,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 108 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:50:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 20:50:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-04-06 20:50:46,089 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 35 [2022-04-06 20:50:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:46,089 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-04-06 20:50:46,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-04-06 20:50:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:50:46,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:46,090 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:46,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 20:50:46,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:50:46,291 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash 561131874, now seen corresponding path program 45 times [2022-04-06 20:50:46,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:46,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [674469905] [2022-04-06 20:50:46,292 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:46,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash 561131874, now seen corresponding path program 46 times [2022-04-06 20:50:46,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:46,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105384688] [2022-04-06 20:50:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:46,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:46,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:46,659 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 20:50:46,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:46,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105384688] [2022-04-06 20:50:46,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105384688] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:46,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609079660] [2022-04-06 20:50:46,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:46,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:46,660 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:46,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:50:46,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:46,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:50:46,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:46,833 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 20:50:46,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:47,702 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 20:50:47,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609079660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:47,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:47,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:50:47,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:47,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [674469905] [2022-04-06 20:50:47,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [674469905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:47,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:47,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:50:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267891140] [2022-04-06 20:50:47,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:47,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:50:47,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:50:47,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:50:47,705 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 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 20:50:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:48,308 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2022-04-06 20:50:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:50:48,308 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 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 20:50:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:48,309 INFO L225 Difference]: With dead ends: 85 [2022-04-06 20:50:48,309 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:50:48,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1443, Invalid=4257, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:50:48,311 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:48,311 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 133 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:50:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 20:50:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-04-06 20:50:48,316 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 36 [2022-04-06 20:50:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:48,316 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-04-06 20:50:48,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 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 20:50:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-04-06 20:50:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:50:48,316 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:48,316 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:48,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 20:50:48,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:48,524 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:48,525 INFO L85 PathProgramCache]: Analyzing trace with hash 241521474, now seen corresponding path program 47 times [2022-04-06 20:50:48,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:48,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542782397] [2022-04-06 20:50:48,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:48,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:48,526 INFO L85 PathProgramCache]: Analyzing trace with hash 241521474, now seen corresponding path program 48 times [2022-04-06 20:50:48,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:48,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521081088] [2022-04-06 20:50:48,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:48,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:48,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:48,888 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 20:50:48,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521081088] [2022-04-06 20:50:48,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521081088] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713352264] [2022-04-06 20:50:48,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:48,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:48,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:48,889 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:48,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:50:49,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:50:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:50:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:49,542 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 20:50:49,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:50:49,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713352264] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:49,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:49,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 8] total 35 [2022-04-06 20:50:49,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:49,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542782397] [2022-04-06 20:50:49,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542782397] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:49,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:49,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:50:49,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049669675] [2022-04-06 20:50:49,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:49,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:50:49,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:49,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:50:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:50:49,719 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:50,454 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-04-06 20:50:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:50:50,455 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:50:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:50,455 INFO L225 Difference]: With dead ends: 87 [2022-04-06 20:50:50,455 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 20:50:50,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:50:50,456 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:50,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 148 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 20:50:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-04-06 20:50:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-04-06 20:50:50,461 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2022-04-06 20:50:50,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:50,461 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-04-06 20:50:50,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:50,463 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-04-06 20:50:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:50:50,463 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:50,463 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:50,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:50,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:50:50,668 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:50,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:50,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1076466334, now seen corresponding path program 49 times [2022-04-06 20:50:50,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:50,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [632288540] [2022-04-06 20:50:50,669 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:50,669 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1076466334, now seen corresponding path program 50 times [2022-04-06 20:50:50,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:50,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836481443] [2022-04-06 20:50:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:50,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:51,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:51,036 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 20:50:51,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:51,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836481443] [2022-04-06 20:50:51,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836481443] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:51,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917029781] [2022-04-06 20:50:51,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:51,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:51,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:51,038 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:51,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:50:51,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:51,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:50:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:51,205 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 20:50:51,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:52,174 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 20:50:52,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917029781] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:52,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:52,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:50:52,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:52,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [632288540] [2022-04-06 20:50:52,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [632288540] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:52,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:52,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:50:52,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576396354] [2022-04-06 20:50:52,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:52,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:50:52,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:50:52,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=2243, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:50:52,176 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 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 20:50:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:52,791 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-04-06 20:50:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:50:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 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 20:50:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:52,791 INFO L225 Difference]: With dead ends: 89 [2022-04-06 20:50:52,792 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:50:52,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1667, Invalid=4975, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:50:52,793 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:52,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:52,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:50:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-04-06 20:50:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-04-06 20:50:52,814 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 38 [2022-04-06 20:50:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:52,814 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-04-06 20:50:52,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 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 20:50:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-04-06 20:50:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:50:52,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:52,815 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:52,832 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 20:50:53,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:50:53,024 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1015584578, now seen corresponding path program 51 times [2022-04-06 20:50:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:53,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1663402495] [2022-04-06 20:50:53,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:53,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:53,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1015584578, now seen corresponding path program 52 times [2022-04-06 20:50:53,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:53,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016365791] [2022-04-06 20:50:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:53,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:53,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:53,413 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 20:50:53,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:53,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016365791] [2022-04-06 20:50:53,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016365791] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:53,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986036753] [2022-04-06 20:50:53,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:53,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:53,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:53,414 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:53,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:50:53,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:53,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:53,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:50:53,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:53,612 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 20:50:53,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:54,674 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 20:50:54,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986036753] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:54,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:54,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:50:54,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1663402495] [2022-04-06 20:50:54,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1663402495] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:54,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:54,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:50:54,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043210056] [2022-04-06 20:50:54,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:54,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:50:54,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:50:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=2410, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:50:54,677 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:55,342 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2022-04-06 20:50:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:50:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:50:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:55,345 INFO L225 Difference]: With dead ends: 91 [2022-04-06 20:50:55,345 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:50:55,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1785, Invalid=5355, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:50:55,347 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:55,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:50:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 20:50:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-04-06 20:50:55,352 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 39 [2022-04-06 20:50:55,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:55,352 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-04-06 20:50:55,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-04-06 20:50:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:50:55,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:55,363 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:55,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:55,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:55,568 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:55,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1444653410, now seen corresponding path program 53 times [2022-04-06 20:50:55,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:55,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138278351] [2022-04-06 20:50:55,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:55,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:55,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1444653410, now seen corresponding path program 54 times [2022-04-06 20:50:55,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:55,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196148077] [2022-04-06 20:50:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:55,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:55,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:55,980 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 20:50:55,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:55,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196148077] [2022-04-06 20:50:55,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196148077] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690591663] [2022-04-06 20:50:55,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:55,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:55,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:55,982 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:55,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:50:56,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 20:50:56,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:50:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:56,961 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 20:50:56,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:58,082 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 20:50:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690591663] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:58,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:58,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:50:58,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:58,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138278351] [2022-04-06 20:50:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138278351] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:58,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:58,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:50:58,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758482797] [2022-04-06 20:50:58,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:58,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:50:58,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:58,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:50:58,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:50:58,084 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 30 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 20:50:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:58,843 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-04-06 20:50:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:50:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 30 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 20:50:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:58,843 INFO L225 Difference]: With dead ends: 93 [2022-04-06 20:50:58,843 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 20:50:58,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1907, Invalid=5749, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:50:58,844 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:58,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 103 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 20:50:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 20:50:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-04-06 20:50:58,850 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 40 [2022-04-06 20:50:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:58,850 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-04-06 20:50:58,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 30 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 20:50:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-04-06 20:50:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:50:58,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:58,850 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:58,859 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 20:50:59,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:59,055 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:59,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:59,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1860885314, now seen corresponding path program 55 times [2022-04-06 20:50:59,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:59,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [63459531] [2022-04-06 20:50:59,056 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:59,056 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:59,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1860885314, now seen corresponding path program 56 times [2022-04-06 20:50:59,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:59,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466038643] [2022-04-06 20:50:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:59,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:59,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:59,478 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 20:50:59,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:59,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466038643] [2022-04-06 20:50:59,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466038643] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:59,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284415127] [2022-04-06 20:50:59,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:59,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:59,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:59,479 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:59,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:50:59,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:59,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:59,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:50:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:59,686 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 20:50:59,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:00,838 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 20:51:00,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284415127] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:00,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:00,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:51:00,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:00,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [63459531] [2022-04-06 20:51:00,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [63459531] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:00,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:00,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:51:00,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790292812] [2022-04-06 20:51:00,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:00,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:51:00,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:00,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:51:00,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:51:00,840 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:01,563 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-04-06 20:51:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:51:01,564 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:51:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:01,564 INFO L225 Difference]: With dead ends: 95 [2022-04-06 20:51:01,564 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:51:01,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2033, Invalid=6157, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:51:01,565 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:01,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:51:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:51:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-04-06 20:51:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-04-06 20:51:01,569 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 41 [2022-04-06 20:51:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:01,569 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-04-06 20:51:01,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-04-06 20:51:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:51:01,570 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:01,570 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:01,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 20:51:01,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:01,770 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:01,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1879172450, now seen corresponding path program 57 times [2022-04-06 20:51:01,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:01,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [564037865] [2022-04-06 20:51:01,771 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:01,771 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1879172450, now seen corresponding path program 58 times [2022-04-06 20:51:01,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:01,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917793773] [2022-04-06 20:51:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:01,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:02,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:02,242 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 20:51:02,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:02,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917793773] [2022-04-06 20:51:02,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917793773] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:02,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949153447] [2022-04-06 20:51:02,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:02,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:02,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:02,243 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:02,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:51:02,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:02,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:51:02,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:02,450 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 20:51:02,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:03,670 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 20:51:03,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949153447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:03,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:03,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:51:03,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:03,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [564037865] [2022-04-06 20:51:03,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [564037865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:03,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:03,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:51:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431476829] [2022-04-06 20:51:03,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:03,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:51:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:51:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=2947, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:51:03,673 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 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 20:51:04,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:04,480 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-04-06 20:51:04,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:51:04,480 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 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 20:51:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:04,480 INFO L225 Difference]: With dead ends: 97 [2022-04-06 20:51:04,480 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 20:51:04,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2163, Invalid=6579, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:51:04,482 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:04,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 73 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:51:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 20:51:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-04-06 20:51:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-04-06 20:51:04,487 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 42 [2022-04-06 20:51:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:04,487 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-04-06 20:51:04,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 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 20:51:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-04-06 20:51:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:51:04,487 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:04,487 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:04,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:04,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:04,688 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1848893630, now seen corresponding path program 59 times [2022-04-06 20:51:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:04,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [383554289] [2022-04-06 20:51:04,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:04,689 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1848893630, now seen corresponding path program 60 times [2022-04-06 20:51:04,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:04,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648503395] [2022-04-06 20:51:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:05,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:05,168 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 20:51:05,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648503395] [2022-04-06 20:51:05,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648503395] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104245066] [2022-04-06 20:51:05,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:05,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:05,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:05,170 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:05,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:51:06,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 20:51:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:06,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:51:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:06,244 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 20:51:06,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:08,465 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 20:51:08,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104245066] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:08,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:08,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 36] total 69 [2022-04-06 20:51:08,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [383554289] [2022-04-06 20:51:08,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [383554289] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:08,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:08,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:51:08,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833230595] [2022-04-06 20:51:08,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:08,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:51:08,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:51:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3518, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:51:08,467 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:09,368 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2022-04-06 20:51:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:51:09,369 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:51:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:09,369 INFO L225 Difference]: With dead ends: 99 [2022-04-06 20:51:09,369 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 20:51:09,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2327, Invalid=7573, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:51:09,370 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:09,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 63 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:51:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 20:51:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-04-06 20:51:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-04-06 20:51:09,374 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 43 [2022-04-06 20:51:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:09,375 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-04-06 20:51:09,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-04-06 20:51:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:51:09,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:09,375 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:09,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:09,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 20:51:09,576 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:09,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1454825118, now seen corresponding path program 61 times [2022-04-06 20:51:09,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:09,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063545624] [2022-04-06 20:51:09,577 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:09,577 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1454825118, now seen corresponding path program 62 times [2022-04-06 20:51:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:09,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691599844] [2022-04-06 20:51:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:09,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:10,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:10,119 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 20:51:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:10,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691599844] [2022-04-06 20:51:10,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691599844] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:10,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476504095] [2022-04-06 20:51:10,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:10,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:10,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:10,120 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:10,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:51:10,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:10,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:10,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:51:10,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:10,355 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 20:51:10,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:11,764 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 20:51:11,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476504095] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:11,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:11,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:51:11,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:11,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063545624] [2022-04-06 20:51:11,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063545624] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:11,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:11,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:51:11,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232705915] [2022-04-06 20:51:11,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:11,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:51:11,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:11,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:51:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=3335, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:51:11,766 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 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 20:51:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:12,709 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-04-06 20:51:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:51:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 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 20:51:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:12,710 INFO L225 Difference]: With dead ends: 101 [2022-04-06 20:51:12,710 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 20:51:12,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2435, Invalid=7465, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:51:12,712 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:12,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 148 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:51:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 20:51:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-06 20:51:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-04-06 20:51:12,717 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 44 [2022-04-06 20:51:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:12,717 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-04-06 20:51:12,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 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 20:51:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-04-06 20:51:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:51:12,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:12,718 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:12,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 20:51:12,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:12,920 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:12,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:12,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2123603134, now seen corresponding path program 63 times [2022-04-06 20:51:12,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:12,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045852853] [2022-04-06 20:51:12,921 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:12,922 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:12,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2123603134, now seen corresponding path program 64 times [2022-04-06 20:51:12,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:12,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61278888] [2022-04-06 20:51:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:12,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,476 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 20:51:13,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:13,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61278888] [2022-04-06 20:51:13,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61278888] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:13,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126907507] [2022-04-06 20:51:13,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:13,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:13,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:13,477 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:13,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:51:13,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:13,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:13,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:51:13,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:13,791 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 20:51:13,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:51:13,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126907507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:13,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:13,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 8] total 43 [2022-04-06 20:51:13,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:13,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045852853] [2022-04-06 20:51:13,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045852853] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:13,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:13,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:51:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135486626] [2022-04-06 20:51:14,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:14,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:51:14,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:51:14,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:51:14,001 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:14,949 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-04-06 20:51:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:51:14,949 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:51:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:14,950 INFO L225 Difference]: With dead ends: 103 [2022-04-06 20:51:14,950 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:51:14,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=377, Invalid=5323, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:51:14,951 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:14,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:51:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:51:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 20:51:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-04-06 20:51:14,955 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 45 [2022-04-06 20:51:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:14,955 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-04-06 20:51:14,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-04-06 20:51:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:51:14,955 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:14,956 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:14,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:51:15,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:15,171 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1380885150, now seen corresponding path program 65 times [2022-04-06 20:51:15,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:15,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1332355319] [2022-04-06 20:51:15,172 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:15,172 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1380885150, now seen corresponding path program 66 times [2022-04-06 20:51:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:15,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008234554] [2022-04-06 20:51:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:15,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,729 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 20:51:15,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008234554] [2022-04-06 20:51:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008234554] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733710784] [2022-04-06 20:51:15,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:15,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:15,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:15,730 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:15,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:51:18,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-06 20:51:18,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:18,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:51:18,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:18,340 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 20:51:18,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:19,911 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 20:51:19,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733710784] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:19,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:19,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:51:19,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1332355319] [2022-04-06 20:51:19,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1332355319] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:19,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:19,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:51:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007915143] [2022-04-06 20:51:19,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:19,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:51:19,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:51:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1365, Invalid=3747, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:51:19,914 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 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 20:51:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:20,947 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-04-06 20:51:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:51:20,947 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 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 20:51:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:20,948 INFO L225 Difference]: With dead ends: 105 [2022-04-06 20:51:20,948 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 20:51:20,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2723, Invalid=8407, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:51:20,949 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:20,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 118 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:51:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 20:51:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-04-06 20:51:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-04-06 20:51:20,953 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 46 [2022-04-06 20:51:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:20,953 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-04-06 20:51:20,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 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 20:51:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-04-06 20:51:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:51:20,954 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:20,954 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:20,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:21,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 20:51:21,154 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash 168535874, now seen corresponding path program 67 times [2022-04-06 20:51:21,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:21,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [195975890] [2022-04-06 20:51:21,155 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:21,156 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash 168535874, now seen corresponding path program 68 times [2022-04-06 20:51:21,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:21,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555405863] [2022-04-06 20:51:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:21,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:21,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:21,748 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 20:51:21,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:21,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555405863] [2022-04-06 20:51:21,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555405863] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:21,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975275420] [2022-04-06 20:51:21,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:21,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:21,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:21,749 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:21,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:51:21,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:21,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:21,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:51:21,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:22,005 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 20:51:22,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:23,692 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 20:51:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975275420] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:23,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:23,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 20:51:23,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:23,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [195975890] [2022-04-06 20:51:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [195975890] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:23,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:23,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:51:23,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622877995] [2022-04-06 20:51:23,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:23,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:51:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:51:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=3962, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:51:23,695 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:24,806 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-04-06 20:51:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:51:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:51:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:24,806 INFO L225 Difference]: With dead ends: 107 [2022-04-06 20:51:24,806 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:51:24,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2873, Invalid=8899, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:51:24,808 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:24,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:51:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:51:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 20:51:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-04-06 20:51:24,813 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 47 [2022-04-06 20:51:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:24,813 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-04-06 20:51:24,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-04-06 20:51:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:51:24,813 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:24,813 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:24,837 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 20:51:25,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 20:51:25,014 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:25,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 955947362, now seen corresponding path program 69 times [2022-04-06 20:51:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:25,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [804829818] [2022-04-06 20:51:25,015 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:25,016 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash 955947362, now seen corresponding path program 70 times [2022-04-06 20:51:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:25,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365198222] [2022-04-06 20:51:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:25,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:25,628 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 20:51:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365198222] [2022-04-06 20:51:25,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365198222] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642613125] [2022-04-06 20:51:25,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:25,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:25,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:25,629 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:25,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:51:25,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:25,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:25,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:51:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:25,887 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 20:51:25,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:27,677 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 20:51:27,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642613125] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:27,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:27,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:51:27,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:27,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [804829818] [2022-04-06 20:51:27,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [804829818] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:27,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:27,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:51:27,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187559384] [2022-04-06 20:51:27,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:27,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:51:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:51:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1517, Invalid=4183, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:51:27,681 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 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 20:51:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:28,866 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-04-06 20:51:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:51:28,867 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 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 20:51:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:28,867 INFO L225 Difference]: With dead ends: 109 [2022-04-06 20:51:28,867 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 20:51:28,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3027, Invalid=9405, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:51:28,869 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:28,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 203 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1874 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:51:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 20:51:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 20:51:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-04-06 20:51:28,873 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 48 [2022-04-06 20:51:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:28,873 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-04-06 20:51:28,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 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 20:51:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-04-06 20:51:28,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:51:28,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:28,874 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:28,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:51:29,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:51:29,074 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:29,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:29,074 INFO L85 PathProgramCache]: Analyzing trace with hash -404100286, now seen corresponding path program 71 times [2022-04-06 20:51:29,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:29,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402042560] [2022-04-06 20:51:29,075 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:29,075 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash -404100286, now seen corresponding path program 72 times [2022-04-06 20:51:29,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:29,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952406520] [2022-04-06 20:51:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:29,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:29,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:29,763 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 20:51:29,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:29,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952406520] [2022-04-06 20:51:29,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952406520] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:29,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259129285] [2022-04-06 20:51:29,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:29,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:29,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:29,765 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:29,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:51:31,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 20:51:31,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:51:31,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:31,717 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 20:51:31,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:34,587 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 20:51:34,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259129285] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:34,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:34,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 42] total 81 [2022-04-06 20:51:34,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1402042560] [2022-04-06 20:51:34,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1402042560] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:34,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:34,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:51:34,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091865852] [2022-04-06 20:51:34,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:34,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:51:34,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:34,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:51:34,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1622, Invalid=4858, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:51:34,589 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 40 states, 40 states have (on average 1.125) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:35,779 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2022-04-06 20:51:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:51:35,779 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:51:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:35,779 INFO L225 Difference]: With dead ends: 111 [2022-04-06 20:51:35,779 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 20:51:35,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3220, Invalid=10586, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:51:35,781 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:35,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 128 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:51:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 20:51:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 20:51:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-04-06 20:51:35,786 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 49 [2022-04-06 20:51:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:35,786 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-04-06 20:51:35,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-04-06 20:51:35,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:51:35,787 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:35,787 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:35,792 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 20:51:35,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:51:35,992 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash 384095586, now seen corresponding path program 73 times [2022-04-06 20:51:35,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:35,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [453337081] [2022-04-06 20:51:35,993 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:35,994 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:35,994 INFO L85 PathProgramCache]: Analyzing trace with hash 384095586, now seen corresponding path program 74 times [2022-04-06 20:51:35,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:35,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663442953] [2022-04-06 20:51:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:35,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:36,705 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 20:51:36,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:36,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663442953] [2022-04-06 20:51:36,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663442953] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:36,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353011020] [2022-04-06 20:51:36,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:36,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:36,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:36,706 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:36,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:51:36,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:51:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:36,926 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 20:51:36,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:38,922 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 20:51:38,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353011020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:38,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:38,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 20:51:38,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:38,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [453337081] [2022-04-06 20:51:38,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [453337081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:38,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:38,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:51:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675083830] [2022-04-06 20:51:38,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:38,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:51:38,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:51:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1677, Invalid=4643, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:51:38,924 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 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 20:51:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:40,102 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-04-06 20:51:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:51:40,102 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 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 20:51:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:40,102 INFO L225 Difference]: With dead ends: 113 [2022-04-06 20:51:40,102 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 20:51:40,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3347, Invalid=10459, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:51:40,104 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:40,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 48 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:51:40,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 20:51:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-04-06 20:51:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-04-06 20:51:40,109 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 50 [2022-04-06 20:51:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:40,109 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-04-06 20:51:40,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 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 20:51:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-04-06 20:51:40,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:51:40,109 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:40,109 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:40,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 20:51:40,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:40,315 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:40,315 INFO L85 PathProgramCache]: Analyzing trace with hash -951636158, now seen corresponding path program 75 times [2022-04-06 20:51:40,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:40,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760585905] [2022-04-06 20:51:40,316 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:40,316 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash -951636158, now seen corresponding path program 76 times [2022-04-06 20:51:40,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:40,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010410070] [2022-04-06 20:51:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:40,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:41,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:41,053 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 20:51:41,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:41,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010410070] [2022-04-06 20:51:41,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010410070] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:41,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621564506] [2022-04-06 20:51:41,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:41,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:41,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:41,054 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:41,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:51:41,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:41,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:51:41,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:41,330 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 20:51:41,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:43,380 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 20:51:43,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621564506] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:43,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:43,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 20:51:43,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [760585905] [2022-04-06 20:51:43,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [760585905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:43,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:43,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:51:43,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600647159] [2022-04-06 20:51:43,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:43,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:51:43,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:51:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1760, Invalid=4882, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:51:43,382 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:44,599 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2022-04-06 20:51:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:51:44,599 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:51:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:44,600 INFO L225 Difference]: With dead ends: 115 [2022-04-06 20:51:44,600 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:51:44,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3513, Invalid=11007, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:51:44,602 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:44,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 113 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:51:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:51:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-04-06 20:51:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-04-06 20:51:44,606 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 51 [2022-04-06 20:51:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:44,606 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-04-06 20:51:44,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-04-06 20:51:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:51:44,607 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:44,607 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:44,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:44,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:51:44,808 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 590352738, now seen corresponding path program 77 times [2022-04-06 20:51:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:44,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1810823955] [2022-04-06 20:51:44,809 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:44,809 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash 590352738, now seen corresponding path program 78 times [2022-04-06 20:51:44,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:44,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678989033] [2022-04-06 20:51:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:44,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:45,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:45,523 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 20:51:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:45,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678989033] [2022-04-06 20:51:45,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678989033] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:45,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476776013] [2022-04-06 20:51:45,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:45,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:45,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:45,524 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:45,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:51:51,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-04-06 20:51:51,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:51,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:51:51,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:51,259 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 20:51:51,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:53,396 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 20:51:53,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476776013] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:53,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:53,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 20:51:53,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:53,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1810823955] [2022-04-06 20:51:53,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1810823955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:53,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:53,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:51:53,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167049875] [2022-04-06 20:51:53,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:53,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:51:53,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:53,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:51:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1845, Invalid=5127, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:51:53,399 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 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 20:51:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:54,751 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-04-06 20:51:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:51:54,751 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 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 20:51:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:54,752 INFO L225 Difference]: With dead ends: 117 [2022-04-06 20:51:54,752 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 20:51:54,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3683, Invalid=11569, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:51:54,753 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:54,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:51:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 20:51:54,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 20:51:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-04-06 20:51:54,758 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 52 [2022-04-06 20:51:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:54,758 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-04-06 20:51:54,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 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 20:51:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-04-06 20:51:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:51:54,759 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:54,759 INFO L499 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:54,767 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 20:51:54,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 20:51:54,964 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:54,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1147368258, now seen corresponding path program 79 times [2022-04-06 20:51:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:54,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1266351452] [2022-04-06 20:51:54,965 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:54,965 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1147368258, now seen corresponding path program 80 times [2022-04-06 20:51:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:54,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859930067] [2022-04-06 20:51:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:55,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:55,731 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 20:51:55,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:55,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859930067] [2022-04-06 20:51:55,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859930067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:55,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777233898] [2022-04-06 20:51:55,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:55,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:55,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:55,733 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:55,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:51:55,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:55,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:55,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:51:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:56,008 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 20:51:56,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:58,263 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 20:51:58,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777233898] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:58,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:58,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 20:51:58,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:58,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1266351452] [2022-04-06 20:51:58,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1266351452] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:58,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:58,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:51:58,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621754552] [2022-04-06 20:51:58,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:58,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:51:58,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:58,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:51:58,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1932, Invalid=5378, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:51:58,265 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:59,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:59,552 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2022-04-06 20:51:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:51:59,552 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:51:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:59,552 INFO L225 Difference]: With dead ends: 119 [2022-04-06 20:51:59,552 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:51:59,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3857, Invalid=12145, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:51:59,554 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:59,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:51:59,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:51:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 20:51:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-04-06 20:51:59,559 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 53 [2022-04-06 20:51:59,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:59,559 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-04-06 20:51:59,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-04-06 20:51:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:51:59,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:59,559 INFO L499 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:59,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:59,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 20:51:59,779 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:59,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1234980194, now seen corresponding path program 81 times [2022-04-06 20:51:59,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:59,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [549116608] [2022-04-06 20:51:59,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:59,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:59,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1234980194, now seen corresponding path program 82 times [2022-04-06 20:51:59,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:59,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513234598] [2022-04-06 20:51:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:59,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:00,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:00,565 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 20:52:00,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:00,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513234598] [2022-04-06 20:52:00,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513234598] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135518713] [2022-04-06 20:52:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:00,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:00,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:00,567 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:00,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:52:00,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:00,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:00,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:52:00,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:00,837 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 20:52:00,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:03,209 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 20:52:03,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135518713] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:03,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:03,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 20:52:03,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:03,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [549116608] [2022-04-06 20:52:03,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [549116608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:03,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:03,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:52:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614474189] [2022-04-06 20:52:03,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:03,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:52:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:52:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=5635, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:52:03,211 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 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 20:52:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:04,572 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2022-04-06 20:52:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:52:04,573 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 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 20:52:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:04,573 INFO L225 Difference]: With dead ends: 121 [2022-04-06 20:52:04,573 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:52:04,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4035, Invalid=12735, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:52:04,574 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:04,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 2092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:52:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:52:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-04-06 20:52:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-04-06 20:52:04,579 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 54 [2022-04-06 20:52:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:04,579 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-04-06 20:52:04,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 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 20:52:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-04-06 20:52:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:52:04,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:04,580 INFO L499 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:04,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:04,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:04,780 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash -344017086, now seen corresponding path program 83 times [2022-04-06 20:52:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [592974813] [2022-04-06 20:52:04,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:04,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash -344017086, now seen corresponding path program 84 times [2022-04-06 20:52:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:04,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740260104] [2022-04-06 20:52:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:04,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:05,751 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 20:52:05,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:05,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740260104] [2022-04-06 20:52:05,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740260104] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:05,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687916377] [2022-04-06 20:52:05,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:05,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:05,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:05,753 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:05,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:52:10,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 20:52:10,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 20:52:10,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:10,663 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 20:52:10,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:13,142 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 20:52:13,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687916377] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:13,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:13,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 20:52:13,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:13,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [592974813] [2022-04-06 20:52:13,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [592974813] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:13,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:13,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:52:13,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271651226] [2022-04-06 20:52:13,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:13,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:52:13,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:13,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:52:13,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=5898, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:52:13,144 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:14,549 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2022-04-06 20:52:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:52:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:52:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:14,549 INFO L225 Difference]: With dead ends: 123 [2022-04-06 20:52:14,549 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 20:52:14,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4217, Invalid=13339, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:52:14,551 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:14,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:52:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 20:52:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-04-06 20:52:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-04-06 20:52:14,556 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 55 [2022-04-06 20:52:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:14,556 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-04-06 20:52:14,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-04-06 20:52:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:52:14,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:14,556 INFO L499 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:14,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:14,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:14,762 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:14,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:14,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2048292510, now seen corresponding path program 85 times [2022-04-06 20:52:14,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:14,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1099329410] [2022-04-06 20:52:14,763 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:14,763 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2048292510, now seen corresponding path program 86 times [2022-04-06 20:52:14,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:14,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336932625] [2022-04-06 20:52:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:15,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:15,634 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 20:52:15,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336932625] [2022-04-06 20:52:15,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336932625] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938522145] [2022-04-06 20:52:15,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:15,635 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:15,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:52:15,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:15,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:15,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:52:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:15,912 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 20:52:15,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:18,504 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 20:52:18,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938522145] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:18,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:18,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 20:52:18,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:18,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1099329410] [2022-04-06 20:52:18,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1099329410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:18,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:18,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:52:18,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611478081] [2022-04-06 20:52:18,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:18,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:52:18,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:52:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2205, Invalid=6167, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:52:18,506 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 47 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 46 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 20:52:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:20,112 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2022-04-06 20:52:20,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:52:20,113 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 46 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 20:52:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:20,113 INFO L225 Difference]: With dead ends: 125 [2022-04-06 20:52:20,114 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 20:52:20,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4403, Invalid=13957, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:52:20,116 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:20,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 218 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:52:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 20:52:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-04-06 20:52:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-04-06 20:52:20,122 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 56 [2022-04-06 20:52:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:20,122 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-04-06 20:52:20,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 46 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 20:52:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-04-06 20:52:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:52:20,123 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:20,123 INFO L499 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:20,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:20,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 20:52:20,340 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash 953744194, now seen corresponding path program 87 times [2022-04-06 20:52:20,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:20,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655027365] [2022-04-06 20:52:20,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:20,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:20,341 INFO L85 PathProgramCache]: Analyzing trace with hash 953744194, now seen corresponding path program 88 times [2022-04-06 20:52:20,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:20,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967651794] [2022-04-06 20:52:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:20,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:21,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:21,208 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 20:52:21,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:21,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967651794] [2022-04-06 20:52:21,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967651794] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:21,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936494875] [2022-04-06 20:52:21,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:21,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:21,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:21,209 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:21,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:52:21,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:21,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:52:21,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:21,483 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 20:52:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:24,245 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 20:52:24,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936494875] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:24,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:24,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-06 20:52:24,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:24,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655027365] [2022-04-06 20:52:24,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655027365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:24,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:24,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:52:24,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117775552] [2022-04-06 20:52:24,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:24,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:52:24,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:52:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=6442, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:52:24,248 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:25,943 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2022-04-06 20:52:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:52:25,943 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:52:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:25,944 INFO L225 Difference]: With dead ends: 127 [2022-04-06 20:52:25,944 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 20:52:25,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4593, Invalid=14589, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:52:25,946 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:25,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 183 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:52:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 20:52:25,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-04-06 20:52:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-04-06 20:52:25,951 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 57 [2022-04-06 20:52:25,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:25,951 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-04-06 20:52:25,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-04-06 20:52:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:52:25,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:25,951 INFO L499 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:25,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:26,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 20:52:26,162 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash -472398494, now seen corresponding path program 89 times [2022-04-06 20:52:26,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:26,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2143833091] [2022-04-06 20:52:26,163 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:26,163 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:26,163 INFO L85 PathProgramCache]: Analyzing trace with hash -472398494, now seen corresponding path program 90 times [2022-04-06 20:52:26,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:26,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042428610] [2022-04-06 20:52:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:27,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:27,061 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 20:52:27,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:27,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042428610] [2022-04-06 20:52:27,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042428610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:27,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136178020] [2022-04-06 20:52:27,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:27,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:27,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:27,063 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:27,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:52:33,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-04-06 20:52:33,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:52:33,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:33,920 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 20:52:33,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:45,444 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 20:52:45,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136178020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:45,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:45,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 51] total 99 [2022-04-06 20:52:45,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:45,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2143833091] [2022-04-06 20:52:45,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2143833091] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:45,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:45,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:52:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980414479] [2022-04-06 20:52:45,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:45,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:52:45,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:45,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:52:45,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2450, Invalid=7252, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:52:45,446 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 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 20:52:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:47,221 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-04-06 20:52:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:52:47,222 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 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 20:52:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:47,222 INFO L225 Difference]: With dead ends: 129 [2022-04-06 20:52:47,222 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 20:52:47,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4852, Invalid=16028, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:52:47,225 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2719 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:47,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 208 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2719 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:52:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 20:52:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 20:52:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-04-06 20:52:47,231 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 58 [2022-04-06 20:52:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:47,232 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-04-06 20:52:47,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 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 20:52:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-04-06 20:52:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:52:47,232 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:47,232 INFO L499 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:47,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 20:52:47,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 20:52:47,438 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1733148862, now seen corresponding path program 91 times [2022-04-06 20:52:47,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:47,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1778466927] [2022-04-06 20:52:47,439 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:47,439 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1733148862, now seen corresponding path program 92 times [2022-04-06 20:52:47,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:47,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933800136] [2022-04-06 20:52:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:47,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:48,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:48,376 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 20:52:48,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:48,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933800136] [2022-04-06 20:52:48,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933800136] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:48,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015331859] [2022-04-06 20:52:48,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:48,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:48,378 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:48,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:52:48,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:48,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:52:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:48,664 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 20:52:48,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:51,628 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 20:52:51,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015331859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:51,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:51,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-06 20:52:51,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1778466927] [2022-04-06 20:52:51,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1778466927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:51,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:51,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:52:51,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600276603] [2022-04-06 20:52:51,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:51,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:52:51,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:52:51,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2496, Invalid=7010, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:52:51,630 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 50 states, 50 states have (on average 1.1) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:53,342 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2022-04-06 20:52:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:52:53,342 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.1) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:52:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:53,343 INFO L225 Difference]: With dead ends: 131 [2022-04-06 20:52:53,343 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:52:53,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4985, Invalid=15895, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:52:53,345 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:53,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 113 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2527 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:52:53,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:52:53,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-06 20:52:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 62 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-04-06 20:52:53,350 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 59 [2022-04-06 20:52:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:53,350 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-04-06 20:52:53,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.1) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-04-06 20:52:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:52:53,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:53,351 INFO L499 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:53,368 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 20:52:53,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:53,568 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2133262690, now seen corresponding path program 93 times [2022-04-06 20:52:53,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:53,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [364028067] [2022-04-06 20:52:53,570 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:53,570 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:53,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2133262690, now seen corresponding path program 94 times [2022-04-06 20:52:53,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:53,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61549172] [2022-04-06 20:52:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:53,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:54,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:54,579 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 20:52:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:54,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61549172] [2022-04-06 20:52:54,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61549172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:54,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383042463] [2022-04-06 20:52:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:54,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:54,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:54,581 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:54,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:52:54,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:54,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:52:54,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:54,938 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 20:52:54,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:58,029 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 20:52:58,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383042463] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:58,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:58,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-04-06 20:52:58,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:58,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [364028067] [2022-04-06 20:52:58,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [364028067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:58,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:58,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:52:58,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478558288] [2022-04-06 20:52:58,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:58,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:52:58,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:52:58,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2597, Invalid=7303, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:52:58,031 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 51 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 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 20:52:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:59,829 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-04-06 20:52:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:52:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 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 20:52:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:59,831 INFO L225 Difference]: With dead ends: 133 [2022-04-06 20:52:59,831 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 20:52:59,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5187, Invalid=16569, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:52:59,833 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:59,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 133 Invalid, 2785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:52:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 20:52:59,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-04-06 20:52:59,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-04-06 20:52:59,839 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 60 [2022-04-06 20:52:59,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:59,840 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-04-06 20:52:59,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 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 20:52:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-04-06 20:52:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:52:59,840 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:59,840 INFO L499 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:59,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:00,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:00,051 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1732936514, now seen corresponding path program 95 times [2022-04-06 20:53:00,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:00,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [965058429] [2022-04-06 20:53:00,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:00,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:00,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1732936514, now seen corresponding path program 96 times [2022-04-06 20:53:00,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:00,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877176309] [2022-04-06 20:53:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:00,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:01,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:01,096 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 20:53:01,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:01,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877176309] [2022-04-06 20:53:01,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877176309] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:01,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951207832] [2022-04-06 20:53:01,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:01,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:01,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:01,097 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:01,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:53:14,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 20:53:14,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 20:53:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:14,330 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 20:53:14,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:17,535 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 20:53:17,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951207832] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:17,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:17,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 20:53:17,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:17,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [965058429] [2022-04-06 20:53:17,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [965058429] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:17,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:17,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:53:17,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712171700] [2022-04-06 20:53:17,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:17,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:53:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:53:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2700, Invalid=7602, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:53:17,537 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:19,349 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2022-04-06 20:53:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:53:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:53:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:19,350 INFO L225 Difference]: With dead ends: 135 [2022-04-06 20:53:19,350 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:53:19,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5393, Invalid=17257, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:53:19,352 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:19,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 133 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:53:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:53:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-04-06 20:53:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-04-06 20:53:19,357 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 61 [2022-04-06 20:53:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:19,357 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-04-06 20:53:19,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-04-06 20:53:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:53:19,358 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:19,358 INFO L499 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:19,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:19,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:19,563 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:19,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2087240350, now seen corresponding path program 97 times [2022-04-06 20:53:19,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:19,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078691049] [2022-04-06 20:53:19,564 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:19,564 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:19,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2087240350, now seen corresponding path program 98 times [2022-04-06 20:53:19,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014638052] [2022-04-06 20:53:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:19,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:20,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:20,646 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 20:53:20,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:20,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014638052] [2022-04-06 20:53:20,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014638052] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955006371] [2022-04-06 20:53:20,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:20,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:20,648 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:20,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:53:20,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:20,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:53:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:20,886 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 20:53:20,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:24,279 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 20:53:24,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955006371] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:24,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:24,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-04-06 20:53:24,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078691049] [2022-04-06 20:53:24,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078691049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:24,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:24,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:53:24,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288952809] [2022-04-06 20:53:24,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:24,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:53:24,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:24,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:53:24,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2805, Invalid=7907, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:53:24,282 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 53 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 52 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 20:53:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:26,272 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-04-06 20:53:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:53:26,273 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 52 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 20:53:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:26,273 INFO L225 Difference]: With dead ends: 137 [2022-04-06 20:53:26,273 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:53:26,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5603, Invalid=17959, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 20:53:26,275 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:26,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 168 Invalid, 3092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2986 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:53:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:53:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-04-06 20:53:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-04-06 20:53:26,280 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2022-04-06 20:53:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:26,281 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-04-06 20:53:26,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 52 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 20:53:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-04-06 20:53:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:53:26,281 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:26,281 INFO L499 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:26,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:26,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-06 20:53:26,495 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash -253638846, now seen corresponding path program 99 times [2022-04-06 20:53:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1088939592] [2022-04-06 20:53:26,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:26,496 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash -253638846, now seen corresponding path program 100 times [2022-04-06 20:53:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:26,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480076888] [2022-04-06 20:53:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:26,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:27,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:27,562 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 20:53:27,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:27,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480076888] [2022-04-06 20:53:27,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480076888] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:27,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710726367] [2022-04-06 20:53:27,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:53:27,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:27,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:27,563 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:27,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:53:27,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:53:27,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:27,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:53:27,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:27,915 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 20:53:27,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:31,354 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 20:53:31,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710726367] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:31,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:31,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-04-06 20:53:31,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:31,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1088939592] [2022-04-06 20:53:31,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1088939592] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:31,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:31,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:53:31,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729999639] [2022-04-06 20:53:31,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:31,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:53:31,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:31,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:53:31,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2912, Invalid=8218, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:53:31,356 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:33,311 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2022-04-06 20:53:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:53:33,311 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:53:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:33,315 INFO L225 Difference]: With dead ends: 139 [2022-04-06 20:53:33,315 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 20:53:33,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5817, Invalid=18675, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:53:33,316 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2939 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:33,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 118 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2939 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:53:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 20:53:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-04-06 20:53:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-04-06 20:53:33,323 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 63 [2022-04-06 20:53:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:33,323 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-04-06 20:53:33,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-04-06 20:53:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:53:33,324 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:33,324 INFO L499 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:33,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:33,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 20:53:33,524 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash 753432930, now seen corresponding path program 101 times [2022-04-06 20:53:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:33,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220439271] [2022-04-06 20:53:33,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:33,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash 753432930, now seen corresponding path program 102 times [2022-04-06 20:53:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108222398] [2022-04-06 20:53:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:34,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:34,620 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 20:53:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:34,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108222398] [2022-04-06 20:53:34,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108222398] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:34,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059347527] [2022-04-06 20:53:34,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:34,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:34,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:34,622 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:34,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:53:52,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-04-06 20:53:52,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:52,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 20:53:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:52,530 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 20:53:52,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:56,202 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 20:53:56,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059347527] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:56,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:56,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 20:53:56,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220439271] [2022-04-06 20:53:56,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220439271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:56,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:56,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:53:56,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543190316] [2022-04-06 20:53:56,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:56,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:53:56,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:56,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:53:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3021, Invalid=8535, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:53:56,205 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 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 20:53:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:58,287 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2022-04-06 20:53:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:53:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 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 20:53:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:58,288 INFO L225 Difference]: With dead ends: 141 [2022-04-06 20:53:58,288 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 20:53:58,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6035, Invalid=19405, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:53:58,290 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3132 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:58,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 148 Invalid, 3242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:53:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 20:53:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-04-06 20:53:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-04-06 20:53:58,295 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 64 [2022-04-06 20:53:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:58,296 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-04-06 20:53:58,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 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 20:53:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-04-06 20:53:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:53:58,296 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:58,296 INFO L499 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:58,303 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 20:53:58,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:58,497 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:58,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1907886914, now seen corresponding path program 103 times [2022-04-06 20:53:58,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:58,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1539283281] [2022-04-06 20:53:58,498 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:58,498 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1907886914, now seen corresponding path program 104 times [2022-04-06 20:53:58,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:58,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111752076] [2022-04-06 20:53:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:58,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:59,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:59,660 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 20:53:59,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:59,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111752076] [2022-04-06 20:53:59,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111752076] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:59,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533366075] [2022-04-06 20:53:59,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:59,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:59,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:59,662 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:59,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:53:59,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:59,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 20:53:59,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:59,983 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 20:53:59,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:03,740 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 20:54:03,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533366075] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:03,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:03,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-04-06 20:54:03,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:03,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1539283281] [2022-04-06 20:54:03,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1539283281] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:03,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:03,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:54:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312415999] [2022-04-06 20:54:03,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:03,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:54:03,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:54:03,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3132, Invalid=8858, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:54:03,743 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:05,858 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2022-04-06 20:54:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:54:05,858 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:54:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:05,860 INFO L225 Difference]: With dead ends: 143 [2022-04-06 20:54:05,860 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:54:05,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6257, Invalid=20149, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:54:05,862 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3193 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:05,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 133 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3193 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:54:05,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:54:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-04-06 20:54:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-04-06 20:54:05,868 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 65 [2022-04-06 20:54:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:05,868 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-04-06 20:54:05,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-04-06 20:54:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:54:05,868 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:05,868 INFO L499 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:05,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:06,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-06 20:54:06,087 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:06,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash -958745246, now seen corresponding path program 105 times [2022-04-06 20:54:06,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:06,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [683871448] [2022-04-06 20:54:06,088 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:06,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash -958745246, now seen corresponding path program 106 times [2022-04-06 20:54:06,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:06,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576443902] [2022-04-06 20:54:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:06,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:07,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:07,249 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 20:54:07,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:07,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576443902] [2022-04-06 20:54:07,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576443902] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:07,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977515619] [2022-04-06 20:54:07,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:07,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:07,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:07,250 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:07,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:54:07,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:07,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:07,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 20:54:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:07,610 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 20:54:07,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:11,556 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 20:54:11,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977515619] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:11,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:11,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-04-06 20:54:11,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:11,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [683871448] [2022-04-06 20:54:11,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [683871448] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:11,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:11,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:54:11,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173297840] [2022-04-06 20:54:11,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:11,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:54:11,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:11,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:54:11,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3245, Invalid=9187, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:54:11,558 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 57 states, 57 states have (on average 1.087719298245614) internal successors, (62), 56 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 20:54:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:13,854 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2022-04-06 20:54:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:54:13,854 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.087719298245614) internal successors, (62), 56 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 20:54:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:13,854 INFO L225 Difference]: With dead ends: 145 [2022-04-06 20:54:13,854 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:54:13,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6483, Invalid=20907, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:54:13,856 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 3647 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 3760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:13,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 248 Invalid, 3760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3647 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:54:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:54:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-04-06 20:54:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-04-06 20:54:13,861 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 66 [2022-04-06 20:54:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:13,862 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-04-06 20:54:13,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.087719298245614) internal successors, (62), 56 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 20:54:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-04-06 20:54:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:54:13,862 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:13,862 INFO L499 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:13,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:14,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-04-06 20:54:14,079 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:14,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash 369971010, now seen corresponding path program 107 times [2022-04-06 20:54:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:14,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [667081692] [2022-04-06 20:54:14,080 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:14,080 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash 369971010, now seen corresponding path program 108 times [2022-04-06 20:54:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:14,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748841657] [2022-04-06 20:54:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:15,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:15,307 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 20:54:15,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748841657] [2022-04-06 20:54:15,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748841657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741147835] [2022-04-06 20:54:15,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:15,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:15,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:15,308 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:15,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:54:21,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 20:54:21,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:21,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 116 conjunts are in the unsatisfiable core [2022-04-06 20:54:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:22,026 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 20:54:22,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:36,515 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 20:54:36,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741147835] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:36,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:36,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 20:54:36,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:36,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [667081692] [2022-04-06 20:54:36,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [667081692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:36,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:36,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:54:36,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665108480] [2022-04-06 20:54:36,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:36,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:54:36,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:36,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:54:36,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3360, Invalid=9522, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:54:36,517 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:38,899 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2022-04-06 20:54:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:54:38,900 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:54:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:38,900 INFO L225 Difference]: With dead ends: 147 [2022-04-06 20:54:38,900 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 20:54:38,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=6713, Invalid=21679, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:54:38,904 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:38,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 233 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3711 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:54:38,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 20:54:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-04-06 20:54:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-04-06 20:54:38,910 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 67 [2022-04-06 20:54:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:38,910 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-04-06 20:54:38,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-04-06 20:54:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:54:38,911 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:38,911 INFO L499 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:38,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:39,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:39,112 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1389498014, now seen corresponding path program 109 times [2022-04-06 20:54:39,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:39,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [568655799] [2022-04-06 20:54:39,117 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:39,117 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1389498014, now seen corresponding path program 110 times [2022-04-06 20:54:39,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:39,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652591376] [2022-04-06 20:54:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:39,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:40,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:40,404 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 20:54:40,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:40,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652591376] [2022-04-06 20:54:40,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652591376] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:40,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472689116] [2022-04-06 20:54:40,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:54:40,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:40,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:40,405 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:40,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:54:40,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:54:40,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:40,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 20:54:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:40,724 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 20:54:40,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:45,134 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 20:54:45,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472689116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:45,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:45,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-04-06 20:54:45,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:45,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [568655799] [2022-04-06 20:54:45,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [568655799] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:45,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:45,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:54:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912840555] [2022-04-06 20:54:45,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:45,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:54:45,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:54:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3477, Invalid=9863, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:54:45,137 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 59 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 58 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 20:54:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:47,892 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2022-04-06 20:54:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:54:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 58 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 20:54:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:47,893 INFO L225 Difference]: With dead ends: 149 [2022-04-06 20:54:47,893 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 20:54:47,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=6947, Invalid=22465, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 20:54:47,895 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3643 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 3761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:47,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 173 Invalid, 3761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3643 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:54:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 20:54:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-06 20:54:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-04-06 20:54:47,902 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 68 [2022-04-06 20:54:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:47,903 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-04-06 20:54:47,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 58 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 20:54:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-04-06 20:54:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:54:47,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:47,903 INFO L499 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:47,927 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 20:54:48,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:48,104 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:48,104 INFO L85 PathProgramCache]: Analyzing trace with hash -98462910, now seen corresponding path program 111 times [2022-04-06 20:54:48,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:48,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [791130293] [2022-04-06 20:54:48,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:48,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:48,105 INFO L85 PathProgramCache]: Analyzing trace with hash -98462910, now seen corresponding path program 112 times [2022-04-06 20:54:48,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:48,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261623890] [2022-04-06 20:54:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:48,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:49,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:49,390 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 20:54:49,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:49,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261623890] [2022-04-06 20:54:49,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261623890] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:49,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445657864] [2022-04-06 20:54:49,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:49,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:49,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:49,392 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:49,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:54:49,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:49,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:49,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 117 conjunts are in the unsatisfiable core [2022-04-06 20:54:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:49,815 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 20:54:49,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-04-06 20:54:50,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445657864] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:50,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:50,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 61, 8] total 67 [2022-04-06 20:54:50,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:50,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [791130293] [2022-04-06 20:54:50,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [791130293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:50,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:50,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:54:50,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923514737] [2022-04-06 20:54:50,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:50,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:54:50,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:54:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=4177, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:54:50,140 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:52,574 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2022-04-06 20:54:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:54:52,574 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:54:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:52,574 INFO L225 Difference]: With dead ends: 151 [2022-04-06 20:54:52,574 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:54:52,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=641, Invalid=14611, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:54:52,576 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3517 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 3637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 3517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:52,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 93 Invalid, 3637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 3517 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:54:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:54:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-04-06 20:54:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-04-06 20:54:52,581 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 69 [2022-04-06 20:54:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:52,581 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-04-06 20:54:52,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-04-06 20:54:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 20:54:52,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:52,582 INFO L499 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:52,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:52,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:54:52,784 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:52,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1268919650, now seen corresponding path program 113 times [2022-04-06 20:54:52,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:52,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902103901] [2022-04-06 20:54:52,785 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:52,785 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1268919650, now seen corresponding path program 114 times [2022-04-06 20:54:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:52,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166888663] [2022-04-06 20:54:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:52,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:54,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:54,152 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 20:54:54,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:54,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166888663] [2022-04-06 20:54:54,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166888663] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:54,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944571119] [2022-04-06 20:54:54,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:54,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:54,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:54,153 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:54,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:55:12,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-04-06 20:55:12,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:12,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 117 conjunts are in the unsatisfiable core [2022-04-06 20:55:12,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:12,980 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 20:55:12,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:17,438 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 20:55:17,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944571119] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:17,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:17,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 20:55:17,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:17,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902103901] [2022-04-06 20:55:17,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902103901] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:17,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:17,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:55:17,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420378706] [2022-04-06 20:55:17,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:17,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:55:17,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:55:17,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3717, Invalid=10563, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:55:17,441 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 60 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 20:55:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:19,814 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2022-04-06 20:55:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:55:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 60 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 20:55:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:19,815 INFO L225 Difference]: With dead ends: 153 [2022-04-06 20:55:19,815 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 20:55:19,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=7427, Invalid=24079, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:55:19,818 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3468 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:19,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 3590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3468 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:55:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 20:55:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-04-06 20:55:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-04-06 20:55:19,824 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 70 [2022-04-06 20:55:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:19,824 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-04-06 20:55:19,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 60 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 20:55:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-04-06 20:55:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:55:19,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:19,824 INFO L499 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:19,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 20:55:20,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:20,031 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:20,031 INFO L85 PathProgramCache]: Analyzing trace with hash 708106050, now seen corresponding path program 115 times [2022-04-06 20:55:20,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:20,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1729276636] [2022-04-06 20:55:20,032 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:20,032 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash 708106050, now seen corresponding path program 116 times [2022-04-06 20:55:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:20,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245591720] [2022-04-06 20:55:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:20,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:21,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:21,407 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 20:55:21,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:21,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245591720] [2022-04-06 20:55:21,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245591720] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:21,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931296586] [2022-04-06 20:55:21,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:55:21,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:21,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:21,409 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:21,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:55:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:55:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:21,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 119 conjunts are in the unsatisfiable core [2022-04-06 20:55:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:21,794 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 20:55:21,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:26,445 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 20:55:26,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931296586] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:26,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:26,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-04-06 20:55:26,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:26,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1729276636] [2022-04-06 20:55:26,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1729276636] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:26,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:26,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:55:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563127391] [2022-04-06 20:55:26,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:26,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:55:26,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:26,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:55:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3840, Invalid=10922, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:55:26,447 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:28,969 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2022-04-06 20:55:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:55:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 20:55:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:28,970 INFO L225 Difference]: With dead ends: 155 [2022-04-06 20:55:28,970 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:55:28,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=7673, Invalid=24907, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 20:55:28,972 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3736 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 3860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:28,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 3860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3736 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:55:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:55:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-04-06 20:55:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-04-06 20:55:28,978 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 71 [2022-04-06 20:55:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:28,978 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-04-06 20:55:28,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-04-06 20:55:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 20:55:28,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:28,978 INFO L499 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:28,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:29,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 20:55:29,191 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash 502753634, now seen corresponding path program 117 times [2022-04-06 20:55:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:29,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1206058868] [2022-04-06 20:55:29,192 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:29,192 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash 502753634, now seen corresponding path program 118 times [2022-04-06 20:55:29,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:29,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285308002] [2022-04-06 20:55:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:29,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:30,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:30,575 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 20:55:30,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:30,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285308002] [2022-04-06 20:55:30,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285308002] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:30,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44692605] [2022-04-06 20:55:30,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:55:30,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:30,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:30,576 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:30,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:55:30,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:55:30,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:30,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-06 20:55:30,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:30,960 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 20:55:30,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:35,721 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 20:55:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44692605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:35,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-04-06 20:55:35,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1206058868] [2022-04-06 20:55:35,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1206058868] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:35,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:35,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:55:35,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27954885] [2022-04-06 20:55:35,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:35,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:55:35,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:55:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3965, Invalid=11287, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:55:35,724 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 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 20:55:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:38,456 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2022-04-06 20:55:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:55:38,456 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 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 20:55:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:38,457 INFO L225 Difference]: With dead ends: 157 [2022-04-06 20:55:38,457 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 20:55:38,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=7923, Invalid=25749, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:55:38,458 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 4412 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 4537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 4412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:38,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 273 Invalid, 4537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 4412 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:55:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 20:55:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-04-06 20:55:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-04-06 20:55:38,464 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 72 [2022-04-06 20:55:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:38,464 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-04-06 20:55:38,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 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 20:55:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-04-06 20:55:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:55:38,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:38,465 INFO L499 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:38,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:38,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-04-06 20:55:38,676 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1568203966, now seen corresponding path program 119 times [2022-04-06 20:55:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:38,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2146291938] [2022-04-06 20:55:38,678 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:38,678 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1568203966, now seen corresponding path program 120 times [2022-04-06 20:55:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:38,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52785708] [2022-04-06 20:55:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:40,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:40,234 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 20:55:40,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:40,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52785708] [2022-04-06 20:55:40,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52785708] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:40,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419217124] [2022-04-06 20:55:40,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:55:40,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:40,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:40,235 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:40,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:56:19,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-04-06 20:56:19,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:19,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 128 conjunts are in the unsatisfiable core [2022-04-06 20:56:19,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:20,142 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 20:56:20,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:39,426 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 20:56:39,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419217124] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:39,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:39,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 66] total 129 [2022-04-06 20:56:39,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:39,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2146291938] [2022-04-06 20:56:39,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2146291938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:39,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:39,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:56:39,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944114295] [2022-04-06 20:56:39,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:39,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:56:39,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:39,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:56:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12352, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:56:39,429 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 64 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:42,235 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2022-04-06 20:56:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:56:42,236 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 20:56:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:42,236 INFO L225 Difference]: With dead ends: 159 [2022-04-06 20:56:42,237 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 20:56:42,239 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=8260, Invalid=27650, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 20:56:42,239 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4159 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 4286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:42,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 148 Invalid, 4286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4159 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:56:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 20:56:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-04-06 20:56:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 76 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-04-06 20:56:42,245 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 73 [2022-04-06 20:56:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:42,245 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-04-06 20:56:42,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-04-06 20:56:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 20:56:42,245 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:42,246 INFO L499 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:42,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:42,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:42,458 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1343380126, now seen corresponding path program 121 times [2022-04-06 20:56:42,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:42,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1263737236] [2022-04-06 20:56:42,459 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:42,460 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:42,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1343380126, now seen corresponding path program 122 times [2022-04-06 20:56:42,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:42,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619109161] [2022-04-06 20:56:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:42,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:43,974 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 20:56:43,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:43,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619109161] [2022-04-06 20:56:43,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619109161] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:43,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569530496] [2022-04-06 20:56:43,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:56:43,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:43,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:43,975 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:43,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:56:44,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:56:44,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:44,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 125 conjunts are in the unsatisfiable core [2022-04-06 20:56:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:44,465 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 20:56:44,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:49,706 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 20:56:49,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569530496] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:49,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:49,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-04-06 20:56:49,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:49,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1263737236] [2022-04-06 20:56:49,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1263737236] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:49,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:49,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:56:49,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906258591] [2022-04-06 20:56:49,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:49,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:56:49,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:56:49,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4221, Invalid=12035, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:56:49,710 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 64 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 20:56:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:52,867 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2022-04-06 20:56:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:56:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 64 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 20:56:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:52,870 INFO L225 Difference]: With dead ends: 161 [2022-04-06 20:56:52,870 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 20:56:52,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=8435, Invalid=27475, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 20:56:52,873 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 4027 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:52,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 63 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4027 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:56:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 20:56:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-04-06 20:56:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-04-06 20:56:52,880 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 74 [2022-04-06 20:56:52,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:52,880 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-04-06 20:56:52,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 64 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 20:56:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-04-06 20:56:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 20:56:52,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:52,881 INFO L499 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:52,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:53,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:53,082 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1331191618, now seen corresponding path program 123 times [2022-04-06 20:56:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:53,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063060320] [2022-04-06 20:56:53,083 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:53,083 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1331191618, now seen corresponding path program 124 times [2022-04-06 20:56:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:53,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058472508] [2022-04-06 20:56:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:53,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:54,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:54,784 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 20:56:54,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:54,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058472508] [2022-04-06 20:56:54,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058472508] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:54,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342027284] [2022-04-06 20:56:54,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:56:54,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:54,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:54,787 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:54,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:56:54,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:56:54,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:54,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 127 conjunts are in the unsatisfiable core [2022-04-06 20:56:54,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:55,194 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 20:56:55,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:00,466 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 20:57:00,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342027284] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:00,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:00,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-04-06 20:57:00,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063060320] [2022-04-06 20:57:00,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063060320] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:00,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:00,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:57:00,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876528487] [2022-04-06 20:57:00,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:00,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:57:00,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:00,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:57:00,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4352, Invalid=12418, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:57:00,468 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 65 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:03,253 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2022-04-06 20:57:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:57:03,253 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 65 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 20:57:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:03,254 INFO L225 Difference]: With dead ends: 163 [2022-04-06 20:57:03,254 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:57:03,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8697, Invalid=28359, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:57:03,257 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:03,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 4180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4048 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:57:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:57:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-04-06 20:57:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-04-06 20:57:03,263 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 75 [2022-04-06 20:57:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:03,263 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-04-06 20:57:03,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 65 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-04-06 20:57:03,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 20:57:03,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:03,264 INFO L499 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:03,280 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 20:57:03,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-04-06 20:57:03,475 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:03,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:03,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1656430238, now seen corresponding path program 125 times [2022-04-06 20:57:03,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:03,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1322839981] [2022-04-06 20:57:03,476 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:03,476 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:03,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1656430238, now seen corresponding path program 126 times [2022-04-06 20:57:03,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:03,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071134895] [2022-04-06 20:57:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:03,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:05,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:05,064 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 20:57:05,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:05,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071134895] [2022-04-06 20:57:05,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071134895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:05,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059747668] [2022-04-06 20:57:05,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:57:05,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:05,066 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:57:05,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:57:43,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-04-06 20:57:43,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:43,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 20:57:43,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:43,356 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 20:57:43,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:32,210 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 20:58:32,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059747668] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:32,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:32,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 69] total 135 [2022-04-06 20:58:32,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:32,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1322839981] [2022-04-06 20:58:32,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1322839981] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:32,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:32,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:58:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878300581] [2022-04-06 20:58:32,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:32,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:58:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:58:32,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4523, Invalid=13567, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:58:32,213 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 67 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 66 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 20:58:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:35,337 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2022-04-06 20:58:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:58:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 66 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 20:58:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:35,338 INFO L225 Difference]: With dead ends: 165 [2022-04-06 20:58:35,338 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 20:58:35,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=9017, Invalid=30385, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:58:35,342 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 4867 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 5000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:35,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 258 Invalid, 5000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4867 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:58:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 20:58:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-04-06 20:58:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-04-06 20:58:35,348 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 76 [2022-04-06 20:58:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:35,349 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-04-06 20:58:35,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 66 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 20:58:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-04-06 20:58:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:58:35,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:35,349 INFO L499 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:35,371 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 20:58:35,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:58:35,555 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash 216572738, now seen corresponding path program 127 times [2022-04-06 20:58:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:35,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [955444734] [2022-04-06 20:58:35,556 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:35,557 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash 216572738, now seen corresponding path program 128 times [2022-04-06 20:58:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:35,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138034179] [2022-04-06 20:58:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:37,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:37,176 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 20:58:37,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:37,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138034179] [2022-04-06 20:58:37,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138034179] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:37,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962690560] [2022-04-06 20:58:37,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:58:37,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:37,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:37,178 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:58:37,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:58:37,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:58:37,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:37,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 20:58:37,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:37,527 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 20:58:37,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:43,211 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 20:58:43,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962690560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:43,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:43,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-04-06 20:58:43,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:43,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [955444734] [2022-04-06 20:58:43,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [955444734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:43,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:43,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:58:43,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218769147] [2022-04-06 20:58:43,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:43,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:58:43,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:43,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:58:43,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4620, Invalid=13202, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:58:43,214 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:46,355 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2022-04-06 20:58:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:58:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 20:58:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:46,356 INFO L225 Difference]: With dead ends: 167 [2022-04-06 20:58:46,356 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 20:58:46,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=9233, Invalid=30169, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:58:46,358 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4861 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 4997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 4861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:46,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 213 Invalid, 4997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 4861 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:58:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 20:58:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-04-06 20:58:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 80 states have internal predecessors, (83), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-04-06 20:58:46,364 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 77 [2022-04-06 20:58:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:46,364 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-04-06 20:58:46,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-04-06 20:58:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 20:58:46,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:46,365 INFO L499 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:46,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:46,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:46,581 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:46,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1849877150, now seen corresponding path program 129 times [2022-04-06 20:58:46,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:46,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1239397780] [2022-04-06 20:58:46,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:46,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:46,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1849877150, now seen corresponding path program 130 times [2022-04-06 20:58:46,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:46,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401894516] [2022-04-06 20:58:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:46,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:48,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:48,253 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 20:58:48,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401894516] [2022-04-06 20:58:48,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401894516] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021592314] [2022-04-06 20:58:48,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:58:48,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:48,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:48,254 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:58:48,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:58:48,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:58:48,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:48,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 20:58:48,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:48,635 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 20:58:48,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:54,552 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 20:58:54,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021592314] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:54,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:54,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-04-06 20:58:54,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:54,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1239397780] [2022-04-06 20:58:54,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1239397780] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:54,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:54,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:58:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646072022] [2022-04-06 20:58:54,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:54,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:58:54,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:58:54,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=13603, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:58:54,555 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 69 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 68 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 20:58:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:58,329 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2022-04-06 20:58:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:58:58,329 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 68 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 20:58:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:58,330 INFO L225 Difference]: With dead ends: 169 [2022-04-06 20:58:58,330 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 20:58:58,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=9507, Invalid=31095, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:58:58,334 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 5248 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 5386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 5248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:58,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 298 Invalid, 5386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 5248 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:58:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 20:58:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-04-06 20:58:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-04-06 20:58:58,342 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 78 [2022-04-06 20:58:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:58,342 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-04-06 20:58:58,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 68 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 20:58:58,343 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-04-06 20:58:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 20:58:58,359 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:58,360 INFO L499 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:58,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 20:58:58,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:58:58,560 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:58,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1485314238, now seen corresponding path program 131 times [2022-04-06 20:58:58,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:58,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1167232122] [2022-04-06 20:58:58,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:58,562 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1485314238, now seen corresponding path program 132 times [2022-04-06 20:58:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:58,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040930229] [2022-04-06 20:58:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:58,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:00,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:00,320 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 20:59:00,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:00,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040930229] [2022-04-06 20:59:00,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040930229] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:00,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100365051] [2022-04-06 20:59:00,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:00,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:00,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:00,322 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:00,322 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 21:00:37,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-06 21:00:37,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:37,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 150 conjunts are in the unsatisfiable core [2022-04-06 21:00:37,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:37,588 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 21:00:37,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:02,262 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 21:01:02,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100365051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:02,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:02,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 72] total 141 [2022-04-06 21:01:02,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:02,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1167232122] [2022-04-06 21:01:02,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1167232122] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:02,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:02,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 21:01:02,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93536875] [2022-04-06 21:01:02,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:02,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 21:01:02,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:02,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 21:01:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4970, Invalid=14769, Unknown=1, NotChecked=0, Total=19740 [2022-04-06 21:01:02,266 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 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 21:01:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:05,987 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2022-04-06 21:01:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 21:01:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 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 21:01:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:05,988 INFO L225 Difference]: With dead ends: 171 [2022-04-06 21:01:05,988 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 21:01:05,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=9876, Invalid=33179, Unknown=1, NotChecked=0, Total=43056 [2022-04-06 21:01:05,993 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5173 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 5312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 5173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:05,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 228 Invalid, 5312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 5173 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 21:01:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 21:01:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-04-06 21:01:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-04-06 21:01:06,000 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 79 [2022-04-06 21:01:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:06,000 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-04-06 21:01:06,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 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 21:01:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-04-06 21:01:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 21:01:06,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:06,006 INFO L499 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:06,020 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 21:01:06,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 21:01:06,207 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:06,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1226201442, now seen corresponding path program 133 times [2022-04-06 21:01:06,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:06,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [714825000] [2022-04-06 21:01:06,208 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:06,208 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1226201442, now seen corresponding path program 134 times [2022-04-06 21:01:06,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:06,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300816119] [2022-04-06 21:01:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:06,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:07,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:07,957 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 21:01:07,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300816119] [2022-04-06 21:01:07,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300816119] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480403898] [2022-04-06 21:01:07,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:07,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:07,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:07,959 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 21:01:07,959 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 21:01:08,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:08,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:08,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 137 conjunts are in the unsatisfiable core [2022-04-06 21:01:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:08,368 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 21:01:08,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:14,668 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 21:01:14,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480403898] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:14,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:14,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-06 21:01:14,668 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:14,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [714825000] [2022-04-06 21:01:14,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [714825000] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:14,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:14,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 21:01:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491496222] [2022-04-06 21:01:14,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:14,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 21:01:14,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 21:01:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5037, Invalid=14423, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 21:01:14,670 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 71 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 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 21:01:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:17,955 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2022-04-06 21:01:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 21:01:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 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 21:01:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:17,956 INFO L225 Difference]: With dead ends: 173 [2022-04-06 21:01:17,956 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 21:01:17,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=10067, Invalid=32989, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 21:01:17,959 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4979 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 5120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 4979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:17,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 118 Invalid, 5120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 4979 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 21:01:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 21:01:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-04-06 21:01:17,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-04-06 21:01:17,966 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 80 [2022-04-06 21:01:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:17,966 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-04-06 21:01:17,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 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 21:01:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-04-06 21:01:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 21:01:17,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:17,967 INFO L499 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:17,983 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 21:01:18,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:18,179 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash -616158398, now seen corresponding path program 135 times [2022-04-06 21:01:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033124005] [2022-04-06 21:01:18,181 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:18,181 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash -616158398, now seen corresponding path program 136 times [2022-04-06 21:01:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:18,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909210240] [2022-04-06 21:01:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:19,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:19,973 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 21:01:19,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:19,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909210240] [2022-04-06 21:01:19,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909210240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:19,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324650610] [2022-04-06 21:01:19,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:19,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:19,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:19,974 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 21:01:19,975 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 21:01:20,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:20,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:20,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 139 conjunts are in the unsatisfiable core [2022-04-06 21:01:20,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:20,333 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 21:01:20,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:26,720 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 21:01:26,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324650610] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:26,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:26,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-04-06 21:01:26,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:26,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033124005] [2022-04-06 21:01:26,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033124005] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:26,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:26,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 21:01:26,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654558224] [2022-04-06 21:01:26,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:26,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 21:01:26,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:26,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 21:01:26,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5180, Invalid=14842, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 21:01:26,723 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 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 21:01:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:30,161 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2022-04-06 21:01:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 21:01:30,162 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 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 21:01:30,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:30,162 INFO L225 Difference]: With dead ends: 175 [2022-04-06 21:01:30,162 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 21:01:30,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=10353, Invalid=33957, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 21:01:30,165 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5252 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 5395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:30,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 163 Invalid, 5395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 5252 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 21:01:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 21:01:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-04-06 21:01:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-04-06 21:01:30,171 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 81 [2022-04-06 21:01:30,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:30,171 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-04-06 21:01:30,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 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 21:01:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-04-06 21:01:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 21:01:30,172 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:30,172 INFO L499 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:30,188 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 21:01:30,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-04-06 21:01:30,373 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1894738590, now seen corresponding path program 137 times [2022-04-06 21:01:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:30,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1528460463] [2022-04-06 21:01:30,374 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:30,374 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1894738590, now seen corresponding path program 138 times [2022-04-06 21:01:30,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:30,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541647248] [2022-04-06 21:01:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:30,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:32,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:32,216 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 21:01:32,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:32,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541647248] [2022-04-06 21:01:32,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541647248] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:32,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692883064] [2022-04-06 21:01:32,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:32,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:32,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:32,218 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 21:01:32,218 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 21:02:42,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2022-04-06 21:02:42,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:43,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 142 conjunts are in the unsatisfiable core [2022-04-06 21:02:43,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:43,302 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 21:02:43,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:11,232 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 21:03:11,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692883064] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:11,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:11,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-04-06 21:03:11,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:11,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1528460463] [2022-04-06 21:03:11,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1528460463] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:11,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:11,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 21:03:11,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464641740] [2022-04-06 21:03:11,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:11,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 21:03:11,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 21:03:11,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5325, Invalid=15267, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 21:03:11,235 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 73 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 72 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 21:03:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:14,661 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2022-04-06 21:03:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 21:03:14,661 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 72 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 21:03:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:14,663 INFO L225 Difference]: With dead ends: 177 [2022-04-06 21:03:14,663 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 21:03:14,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=10643, Invalid=34939, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 21:03:14,665 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 5331 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 5477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 5331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:14,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 5331 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 21:03:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 21:03:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-04-06 21:03:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:03:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-04-06 21:03:14,672 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 82 [2022-04-06 21:03:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:14,672 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-04-06 21:03:14,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 72 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 21:03:14,672 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-04-06 21:03:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 21:03:14,672 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:14,673 INFO L499 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:14,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:14,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:14,873 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:14,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1418948418, now seen corresponding path program 139 times [2022-04-06 21:03:14,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:14,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [724836240] [2022-04-06 21:03:14,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:14,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:14,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1418948418, now seen corresponding path program 140 times [2022-04-06 21:03:14,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:14,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743222751] [2022-04-06 21:03:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:14,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:16,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:16,773 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 21:03:16,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:16,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743222751] [2022-04-06 21:03:16,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743222751] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:16,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043652583] [2022-04-06 21:03:16,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:16,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:16,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:16,774 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 21:03:16,775 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 21:03:16,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:16,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:16,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 143 conjunts are in the unsatisfiable core [2022-04-06 21:03:16,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:17,116 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 21:03:17,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:23,693 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 21:03:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043652583] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:23,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:23,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-04-06 21:03:23,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:23,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [724836240] [2022-04-06 21:03:23,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [724836240] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:23,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:23,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 21:03:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28712701] [2022-04-06 21:03:23,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:23,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 21:03:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 21:03:23,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5472, Invalid=15698, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 21:03:23,696 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 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 21:03:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:27,478 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2022-04-06 21:03:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 21:03:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 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 21:03:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:27,479 INFO L225 Difference]: With dead ends: 179 [2022-04-06 21:03:27,480 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 21:03:27,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2631 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=10937, Invalid=35935, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 21:03:27,482 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 5878 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 6026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 5878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:27,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 278 Invalid, 6026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 5878 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 21:03:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 21:03:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-04-06 21:03:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:03:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-04-06 21:03:27,490 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 83 [2022-04-06 21:03:27,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:27,490 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-04-06 21:03:27,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 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 21:03:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-04-06 21:03:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 21:03:27,490 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:27,491 INFO L499 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:27,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-04-06 21:03:27,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:27,691 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:27,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1064030562, now seen corresponding path program 141 times [2022-04-06 21:03:27,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:27,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089801632] [2022-04-06 21:03:27,692 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:27,692 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:27,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1064030562, now seen corresponding path program 142 times [2022-04-06 21:03:27,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:27,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109495133] [2022-04-06 21:03:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:27,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:29,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:29,620 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 21:03:29,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109495133] [2022-04-06 21:03:29,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109495133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447343304] [2022-04-06 21:03:29,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:29,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:29,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:29,621 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 21:03:29,624 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 21:03:29,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:29,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:29,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 145 conjunts are in the unsatisfiable core [2022-04-06 21:03:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:30,046 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 21:03:30,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:36,836 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 21:03:36,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447343304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:36,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:36,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-04-06 21:03:36,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:36,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089801632] [2022-04-06 21:03:36,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089801632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:36,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:36,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 21:03:36,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584146583] [2022-04-06 21:03:36,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:36,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 21:03:36,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 21:03:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5621, Invalid=16135, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 21:03:36,839 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 75 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 74 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 21:03:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:40,514 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2022-04-06 21:03:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 21:03:40,515 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 74 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 21:03:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:40,515 INFO L225 Difference]: With dead ends: 181 [2022-04-06 21:03:40,515 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 21:03:40,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2704 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=11235, Invalid=36945, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 21:03:40,518 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 5617 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 5767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 5617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:40,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 5767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 5617 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 21:03:40,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 21:03:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-04-06 21:03:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:03:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-04-06 21:03:40,529 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 84 [2022-04-06 21:03:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:40,529 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-04-06 21:03:40,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 74 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 21:03:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-04-06 21:03:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 21:03:40,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:40,530 INFO L499 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:40,549 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 21:03:40,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:40,739 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1348488382, now seen corresponding path program 143 times [2022-04-06 21:03:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:40,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [986741430] [2022-04-06 21:03:40,740 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:40,740 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1348488382, now seen corresponding path program 144 times [2022-04-06 21:03:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:40,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406733142] [2022-04-06 21:03:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:42,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:42,732 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 21:03:42,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:42,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406733142] [2022-04-06 21:03:42,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406733142] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:42,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306537655] [2022-04-06 21:03:42,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:42,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:42,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:42,734 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 21:03:42,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process