/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/nla-digbench/ps4-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:25:25,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:25:25,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:25:25,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:25:25,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:25:25,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:25:25,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:25:25,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:25:25,728 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:25:25,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:25:25,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:25:25,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:25:25,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:25:25,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:25:25,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:25:25,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:25:25,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:25:25,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:25:25,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:25:25,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:25:25,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:25:25,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:25:25,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:25:25,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:25:25,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:25:25,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:25:25,733 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:25:25,733 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:25:25,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:25:25,733 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:25:25,733 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:25:25,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:25:25,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:25:25,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:25:25,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:25:25,992 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:25:25,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4-ll.c [2022-04-06 21:25:26,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4928d714d/494048179ee24574ac7ab7fd78dd1d82/FLAGdc0e0783f [2022-04-06 21:25:26,422 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:25:26,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4-ll.c [2022-04-06 21:25:26,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4928d714d/494048179ee24574ac7ab7fd78dd1d82/FLAGdc0e0783f [2022-04-06 21:25:26,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4928d714d/494048179ee24574ac7ab7fd78dd1d82 [2022-04-06 21:25:26,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:25:26,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:25:26,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:25:26,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:25:26,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:25:26,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc1b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26, skipping insertion in model container [2022-04-06 21:25:26,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:25:26,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:25:26,637 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4-ll.c[458,471] [2022-04-06 21:25:26,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:25:26,656 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:25:26,666 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4-ll.c[458,471] [2022-04-06 21:25:26,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:25:26,681 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:25:26,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26 WrapperNode [2022-04-06 21:25:26,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:25:26,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:25:26,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:25:26,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:25:26,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:25:26,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:25:26,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:25:26,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:25:26,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26" (1/1) ... [2022-04-06 21:25:26,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:25:26,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:26,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 21:25:26,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 21:25:26,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:25:26,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:25:26,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:25:26,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 21:25:26,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:25:26,774 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:25:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 21:25:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:25:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:25:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:25:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-06 21:25:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 21:25:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:25:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:25:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:25:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:25:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:25:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:25:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:25:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:25:26,837 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:25:26,840 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:25:26,928 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:25:26,932 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:25:26,933 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:25:26,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:25:26 BoogieIcfgContainer [2022-04-06 21:25:26,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:25:26,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:25:26,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:25:26,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:25:26,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:25:26" (1/3) ... [2022-04-06 21:25:26,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae97d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:25:26, skipping insertion in model container [2022-04-06 21:25:26,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:25:26" (2/3) ... [2022-04-06 21:25:26,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae97d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:25:26, skipping insertion in model container [2022-04-06 21:25:26,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:25:26" (3/3) ... [2022-04-06 21:25:26,941 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll.c [2022-04-06 21:25:26,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:25:26,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:25:26,983 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:25:26,989 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 21:25:26,989 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:25:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 21:25:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 21:25:27,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:27,007 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:27,007 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash -973133132, now seen corresponding path program 1 times [2022-04-06 21:25:27,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:27,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304267948] [2022-04-06 21:25:27,029 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:25:27,030 INFO L85 PathProgramCache]: Analyzing trace with hash -973133132, now seen corresponding path program 2 times [2022-04-06 21:25:27,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:27,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612964598] [2022-04-06 21:25:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:25:27,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:25:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:25:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:25:27,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612964598] [2022-04-06 21:25:27,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612964598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:27,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:27,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:25:27,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:27,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304267948] [2022-04-06 21:25:27,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304267948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:27,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:27,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:25:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035697634] [2022-04-06 21:25:27,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:27,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:25:27,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:25:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:25:27,279 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 21:25:27,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:27,326 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2022-04-06 21:25:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:25:27,328 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 21:25:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:27,334 INFO L225 Difference]: With dead ends: 38 [2022-04-06 21:25:27,335 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 21:25:27,337 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 21:25:27,341 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 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 21:25:27,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:25:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 21:25:27,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 21:25:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 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 21:25:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 21:25:27,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-06 21:25:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:27,377 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 21:25:27,378 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 21:25:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 21:25:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 21:25:27,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:27,378 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:27,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:25:27,379 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:27,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:27,380 INFO L85 PathProgramCache]: Analyzing trace with hash -971345672, now seen corresponding path program 1 times [2022-04-06 21:25:27,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:27,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557362948] [2022-04-06 21:25:27,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:25:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash -971345672, now seen corresponding path program 2 times [2022-04-06 21:25:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:27,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402787790] [2022-04-06 21:25:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:27,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:27,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:27,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965771909] [2022-04-06 21:25:27,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:25:27,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:27,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:27,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:25:27,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:25:27,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:27,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:25:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:25:27,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:25:27,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:27,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402787790] [2022-04-06 21:25:27,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:27,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965771909] [2022-04-06 21:25:27,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965771909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:27,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:27,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:25:27,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:27,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557362948] [2022-04-06 21:25:27,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557362948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:27,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:27,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:25:27,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489734808] [2022-04-06 21:25:27,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:27,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:25:27,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:27,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:25:27,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:25:27,537 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:25:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:27,581 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-06 21:25:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:25:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have 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 21:25:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:27,582 INFO L225 Difference]: With dead ends: 28 [2022-04-06 21:25:27,582 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 21:25:27,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:25:27,584 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:27,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:25:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 21:25:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 21:25:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:25:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-04-06 21:25:27,593 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2022-04-06 21:25:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:27,594 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-04-06 21:25:27,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:25:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-04-06 21:25:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 21:25:27,594 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:27,595 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:27,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:27,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:27,809 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1679137237, now seen corresponding path program 1 times [2022-04-06 21:25:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:27,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009990593] [2022-04-06 21:25:27,844 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:27,844 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1679137237, now seen corresponding path program 2 times [2022-04-06 21:25:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:27,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501474752] [2022-04-06 21:25:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:27,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:27,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:27,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324878912] [2022-04-06 21:25:27,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:25:27,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:27,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:27,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:27,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:25:27,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:25:27,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:25:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:25:28,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:25:28,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:28,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501474752] [2022-04-06 21:25:28,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:28,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324878912] [2022-04-06 21:25:28,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324878912] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:28,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:28,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 21:25:28,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:28,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009990593] [2022-04-06 21:25:28,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009990593] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:28,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:28,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:25:28,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634698740] [2022-04-06 21:25:28,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:28,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:25:28,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:28,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:25:28,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 21:25:28,603 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:25:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:28,650 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-04-06 21:25:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:25:28,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-06 21:25:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:28,654 INFO L225 Difference]: With dead ends: 30 [2022-04-06 21:25:28,654 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 21:25:28,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:25:28,656 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:28,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 47 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:25:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 21:25:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 21:25:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:25:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-04-06 21:25:28,669 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 18 [2022-04-06 21:25:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:28,669 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-04-06 21:25:28,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:25:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-04-06 21:25:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 21:25:28,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:28,671 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:28,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:28,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 21:25:28,873 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1991962395, now seen corresponding path program 1 times [2022-04-06 21:25:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:28,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [716934794] [2022-04-06 21:25:28,880 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:28,880 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:28,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1991962395, now seen corresponding path program 2 times [2022-04-06 21:25:28,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:28,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442038211] [2022-04-06 21:25:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:28,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:28,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:28,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246665947] [2022-04-06 21:25:28,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:25:28,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:28,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:28,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 21:25:28,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:25:28,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 21:25:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:25:29,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:29,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442038211] [2022-04-06 21:25:29,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246665947] [2022-04-06 21:25:29,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246665947] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:29,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:29,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 21:25:29,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:29,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [716934794] [2022-04-06 21:25:29,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [716934794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:29,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:29,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:25:29,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066772973] [2022-04-06 21:25:29,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:29,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:25:29,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:29,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:25:29,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:25:29,307 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:25:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:29,388 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2022-04-06 21:25:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:25:29,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2022-04-06 21:25:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:29,389 INFO L225 Difference]: With dead ends: 33 [2022-04-06 21:25:29,389 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 21:25:29,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:25:29,396 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:29,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:25:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 21:25:29,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 21:25:29,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:25:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-04-06 21:25:29,414 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2022-04-06 21:25:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:29,415 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-04-06 21:25:29,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:25:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-04-06 21:25:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 21:25:29,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:29,417 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:29,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 21:25:29,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:29,636 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash 486172306, now seen corresponding path program 3 times [2022-04-06 21:25:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:29,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145520310] [2022-04-06 21:25:29,640 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:29,640 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash 486172306, now seen corresponding path program 4 times [2022-04-06 21:25:29,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:29,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678482171] [2022-04-06 21:25:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:29,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:29,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:29,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221714509] [2022-04-06 21:25:29,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:25:29,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:29,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:29,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:29,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 21:25:29,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:25:29,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 21:25:29,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:25:29,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:30,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:30,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678482171] [2022-04-06 21:25:30,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:30,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221714509] [2022-04-06 21:25:30,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221714509] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:30,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:30,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 21:25:30,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:30,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145520310] [2022-04-06 21:25:30,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145520310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:30,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:30,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:25:30,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497538775] [2022-04-06 21:25:30,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:30,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:25:30,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:30,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:25:30,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:25:30,003 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:25:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:30,095 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-04-06 21:25:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:25:30,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2022-04-06 21:25:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:30,098 INFO L225 Difference]: With dead ends: 36 [2022-04-06 21:25:30,098 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 21:25:30,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:25:30,101 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:30,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 107 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:25:30,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 21:25:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 21:25:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:25:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-04-06 21:25:30,116 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 31 [2022-04-06 21:25:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:30,117 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-04-06 21:25:30,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:25:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-04-06 21:25:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 21:25:30,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:30,120 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:30,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:30,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:30,340 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash -625556411, now seen corresponding path program 5 times [2022-04-06 21:25:30,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:30,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1338156656] [2022-04-06 21:25:30,343 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:30,343 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:30,343 INFO L85 PathProgramCache]: Analyzing trace with hash -625556411, now seen corresponding path program 6 times [2022-04-06 21:25:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:30,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064478345] [2022-04-06 21:25:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:30,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:30,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:30,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83873503] [2022-04-06 21:25:30,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:25:30,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:30,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:30,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:30,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 21:25:30,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:25:30,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:30,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 21:25:30,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 21:25:30,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:30,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:30,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064478345] [2022-04-06 21:25:30,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:30,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83873503] [2022-04-06 21:25:30,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83873503] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:30,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:30,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 21:25:30,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1338156656] [2022-04-06 21:25:30,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1338156656] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:30,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:30,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:25:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649846622] [2022-04-06 21:25:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:30,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:25:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:25:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:25:30,843 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:25:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:30,955 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-04-06 21:25:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:25:30,956 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 38 [2022-04-06 21:25:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:30,957 INFO L225 Difference]: With dead ends: 39 [2022-04-06 21:25:30,957 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 21:25:30,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:25:30,958 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:30,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 132 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:25:30,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 21:25:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 21:25:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:25:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-04-06 21:25:30,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 38 [2022-04-06 21:25:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:30,970 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-04-06 21:25:30,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:25:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-04-06 21:25:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 21:25:30,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:30,972 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:30,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:31,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:31,178 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:31,178 INFO L85 PathProgramCache]: Analyzing trace with hash -516282574, now seen corresponding path program 7 times [2022-04-06 21:25:31,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:31,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [734594015] [2022-04-06 21:25:31,182 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:31,183 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash -516282574, now seen corresponding path program 8 times [2022-04-06 21:25:31,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:31,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709820935] [2022-04-06 21:25:31,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:31,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:31,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:31,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700095556] [2022-04-06 21:25:31,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:25:31,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:31,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:31,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:31,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 21:25:31,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:25:31,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:31,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:25:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 21:25:31,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:31,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:31,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709820935] [2022-04-06 21:25:31,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:31,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700095556] [2022-04-06 21:25:31,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700095556] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:31,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:31,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 21:25:31,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:31,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [734594015] [2022-04-06 21:25:31,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [734594015] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:31,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:31,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:25:31,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469823306] [2022-04-06 21:25:31,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:31,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:25:31,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:25:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:25:31,753 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:25:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:31,883 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-06 21:25:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:25:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 45 [2022-04-06 21:25:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:31,885 INFO L225 Difference]: With dead ends: 42 [2022-04-06 21:25:31,885 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 21:25:31,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:25:31,886 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:31,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:25:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 21:25:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 21:25:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:25:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-04-06 21:25:31,895 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 45 [2022-04-06 21:25:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:31,895 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-04-06 21:25:31,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:25:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-04-06 21:25:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:25:31,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:31,896 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:31,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:32,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:32,102 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:32,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1878724517, now seen corresponding path program 9 times [2022-04-06 21:25:32,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:32,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1930394837] [2022-04-06 21:25:32,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:32,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:32,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1878724517, now seen corresponding path program 10 times [2022-04-06 21:25:32,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:32,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148411696] [2022-04-06 21:25:32,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:32,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:32,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:32,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332461913] [2022-04-06 21:25:32,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:25:32,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:32,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:32,116 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:32,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 21:25:32,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:25:32,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:32,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:25:32,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 21:25:32,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:32,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:32,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148411696] [2022-04-06 21:25:32,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:32,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332461913] [2022-04-06 21:25:32,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332461913] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:32,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:32,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 21:25:32,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1930394837] [2022-04-06 21:25:32,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1930394837] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:32,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:32,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:25:32,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750790440] [2022-04-06 21:25:32,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:32,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:25:32,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:25:32,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:25:32,632 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:25:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:32,802 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-04-06 21:25:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:25:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2022-04-06 21:25:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:32,805 INFO L225 Difference]: With dead ends: 45 [2022-04-06 21:25:32,805 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 21:25:32,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:25:32,806 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:32,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 188 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:25:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 21:25:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 21:25:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:25:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-04-06 21:25:32,813 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 52 [2022-04-06 21:25:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:32,814 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-04-06 21:25:32,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:25:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-04-06 21:25:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:25:32,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:32,815 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:32,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:33,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:33,031 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2079567918, now seen corresponding path program 11 times [2022-04-06 21:25:33,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:33,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23688951] [2022-04-06 21:25:33,035 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:33,035 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:33,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2079567918, now seen corresponding path program 12 times [2022-04-06 21:25:33,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:33,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173819252] [2022-04-06 21:25:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:33,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:33,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100809587] [2022-04-06 21:25:33,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:25:33,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:33,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:33,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:33,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:25:33,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:25:33,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:33,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 21:25:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 21:25:33,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:33,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:33,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173819252] [2022-04-06 21:25:33,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:33,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100809587] [2022-04-06 21:25:33,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100809587] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:33,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:33,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 21:25:33,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:33,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23688951] [2022-04-06 21:25:33,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23688951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:33,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:33,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:25:33,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225056068] [2022-04-06 21:25:33,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:33,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:25:33,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:25:33,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:25:33,946 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:25:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:34,146 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-04-06 21:25:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:25:34,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 59 [2022-04-06 21:25:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:34,149 INFO L225 Difference]: With dead ends: 48 [2022-04-06 21:25:34,149 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 21:25:34,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:25:34,150 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:34,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 219 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:25:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 21:25:34,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 21:25:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:25:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-04-06 21:25:34,158 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 59 [2022-04-06 21:25:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:34,159 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-04-06 21:25:34,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:25:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-04-06 21:25:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 21:25:34,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:34,160 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:34,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:34,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 21:25:34,361 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2024272645, now seen corresponding path program 13 times [2022-04-06 21:25:34,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:34,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243228866] [2022-04-06 21:25:34,363 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:34,364 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2024272645, now seen corresponding path program 14 times [2022-04-06 21:25:34,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:34,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274731036] [2022-04-06 21:25:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:34,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797025997] [2022-04-06 21:25:34,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:25:34,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:34,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:34,373 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:34,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 21:25:34,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:25:34,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:34,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 21:25:34,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 21:25:35,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:35,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:35,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274731036] [2022-04-06 21:25:35,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:35,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797025997] [2022-04-06 21:25:35,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797025997] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:35,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 21:25:35,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:35,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243228866] [2022-04-06 21:25:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243228866] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:35,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:25:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633742448] [2022-04-06 21:25:35,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:35,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:25:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:25:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:25:35,247 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:25:35,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:35,474 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-04-06 21:25:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:25:35,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 66 [2022-04-06 21:25:35,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:35,476 INFO L225 Difference]: With dead ends: 51 [2022-04-06 21:25:35,476 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 21:25:35,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:25:35,477 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:35,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 252 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:25:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 21:25:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 21:25:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:25:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-04-06 21:25:35,485 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 66 [2022-04-06 21:25:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:35,486 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-04-06 21:25:35,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:25:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-04-06 21:25:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 21:25:35,487 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:35,487 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:35,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:35,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 21:25:35,694 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:35,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1092280434, now seen corresponding path program 15 times [2022-04-06 21:25:35,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:35,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179613645] [2022-04-06 21:25:35,697 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:35,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1092280434, now seen corresponding path program 16 times [2022-04-06 21:25:35,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:35,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193024811] [2022-04-06 21:25:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:35,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:35,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:35,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046124252] [2022-04-06 21:25:35,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:25:35,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:35,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:35,705 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:35,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:25:36,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:25:36,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:36,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 21:25:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 21:25:36,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:36,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:36,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193024811] [2022-04-06 21:25:36,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:36,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046124252] [2022-04-06 21:25:36,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046124252] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:36,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:36,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 21:25:36,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179613645] [2022-04-06 21:25:36,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179613645] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:36,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:36,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:25:36,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281438921] [2022-04-06 21:25:36,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:36,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:25:36,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:25:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:25:36,864 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:25:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:37,135 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-04-06 21:25:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:25:37,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 73 [2022-04-06 21:25:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:37,136 INFO L225 Difference]: With dead ends: 54 [2022-04-06 21:25:37,136 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 21:25:37,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:25:37,137 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:37,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:25:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 21:25:37,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-06 21:25:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:25:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-04-06 21:25:37,151 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 73 [2022-04-06 21:25:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:37,152 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-04-06 21:25:37,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:25:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-04-06 21:25:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 21:25:37,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:37,155 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:37,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:37,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 21:25:37,362 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:37,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:37,362 INFO L85 PathProgramCache]: Analyzing trace with hash 634613349, now seen corresponding path program 17 times [2022-04-06 21:25:37,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:37,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666848461] [2022-04-06 21:25:37,365 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:37,365 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash 634613349, now seen corresponding path program 18 times [2022-04-06 21:25:37,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:37,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991364231] [2022-04-06 21:25:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:37,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:37,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:37,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677934039] [2022-04-06 21:25:37,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:25:37,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:37,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:37,379 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:37,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:25:37,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 21:25:37,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 21:25:37,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 21:25:38,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:38,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:38,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991364231] [2022-04-06 21:25:38,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:38,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677934039] [2022-04-06 21:25:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677934039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:38,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:38,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-06 21:25:38,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:38,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666848461] [2022-04-06 21:25:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666848461] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:38,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:38,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:25:38,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008774609] [2022-04-06 21:25:38,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:38,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:25:38,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:38,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:25:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:25:38,308 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:25:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:38,587 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-06 21:25:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:25:38,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 80 [2022-04-06 21:25:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:38,589 INFO L225 Difference]: With dead ends: 57 [2022-04-06 21:25:38,589 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 21:25:38,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:25:38,590 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:38,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 324 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:25:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 21:25:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 21:25:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 14 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:25:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-04-06 21:25:38,599 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 80 [2022-04-06 21:25:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:38,600 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-04-06 21:25:38,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:25:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-04-06 21:25:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 21:25:38,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:38,601 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:38,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:38,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 21:25:38,810 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:38,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1567631086, now seen corresponding path program 19 times [2022-04-06 21:25:38,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:38,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2110823531] [2022-04-06 21:25:38,812 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:38,812 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:38,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1567631086, now seen corresponding path program 20 times [2022-04-06 21:25:38,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:38,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55623576] [2022-04-06 21:25:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:38,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:38,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:38,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927738490] [2022-04-06 21:25:38,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:25:38,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:38,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:38,824 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:38,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:25:39,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:25:39,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:39,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 21:25:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 21:25:39,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:40,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55623576] [2022-04-06 21:25:40,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927738490] [2022-04-06 21:25:40,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927738490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:40,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:40,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 21:25:40,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2110823531] [2022-04-06 21:25:40,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2110823531] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:40,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:40,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:25:40,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92030614] [2022-04-06 21:25:40,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:40,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:25:40,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:40,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:25:40,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:25:40,043 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:25:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:40,367 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-04-06 21:25:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:25:40,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 87 [2022-04-06 21:25:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:40,368 INFO L225 Difference]: With dead ends: 60 [2022-04-06 21:25:40,368 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 21:25:40,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:25:40,369 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:40,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 363 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:25:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 21:25:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 21:25:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 15 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 21:25:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-04-06 21:25:40,380 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 87 [2022-04-06 21:25:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:40,380 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-04-06 21:25:40,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:25:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-04-06 21:25:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 21:25:40,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:40,381 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:40,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:40,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 21:25:40,592 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash 169050565, now seen corresponding path program 21 times [2022-04-06 21:25:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:40,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1174116660] [2022-04-06 21:25:40,594 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:40,594 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:40,594 INFO L85 PathProgramCache]: Analyzing trace with hash 169050565, now seen corresponding path program 22 times [2022-04-06 21:25:40,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:40,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704380823] [2022-04-06 21:25:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:40,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:40,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:40,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241789890] [2022-04-06 21:25:40,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:25:40,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:40,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:40,603 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:40,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:25:41,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:25:41,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 21:25:41,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 21:25:42,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:42,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:42,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704380823] [2022-04-06 21:25:42,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:42,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241789890] [2022-04-06 21:25:42,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241789890] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:42,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:42,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 21:25:42,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:42,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1174116660] [2022-04-06 21:25:42,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1174116660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:42,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:42,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:25:42,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141318589] [2022-04-06 21:25:42,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:42,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:25:42,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:42,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:25:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:25:42,386 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 21:25:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:42,713 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-04-06 21:25:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:25:42,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 94 [2022-04-06 21:25:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:42,714 INFO L225 Difference]: With dead ends: 63 [2022-04-06 21:25:42,714 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 21:25:42,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:25:42,715 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:42,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 404 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:25:42,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 21:25:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 21:25:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 16 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:25:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-04-06 21:25:42,726 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 94 [2022-04-06 21:25:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:42,726 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-04-06 21:25:42,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 21:25:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-04-06 21:25:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 21:25:42,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:42,727 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:42,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:42,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 21:25:42,934 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash 555039154, now seen corresponding path program 23 times [2022-04-06 21:25:42,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:42,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240563965] [2022-04-06 21:25:42,936 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:42,936 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash 555039154, now seen corresponding path program 24 times [2022-04-06 21:25:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:42,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424578555] [2022-04-06 21:25:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:42,950 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600643232] [2022-04-06 21:25:42,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:25:42,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:42,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:42,951 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:42,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:25:43,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 21:25:43,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:43,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 21:25:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 21:25:44,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:44,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424578555] [2022-04-06 21:25:44,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:44,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600643232] [2022-04-06 21:25:44,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600643232] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:44,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:44,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 21:25:44,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:44,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240563965] [2022-04-06 21:25:44,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240563965] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:44,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:44,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:25:44,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065061131] [2022-04-06 21:25:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:44,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:25:44,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:25:44,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:25:44,206 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:25:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:44,612 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-04-06 21:25:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:25:44,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 101 [2022-04-06 21:25:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:44,613 INFO L225 Difference]: With dead ends: 66 [2022-04-06 21:25:44,613 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 21:25:44,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:25:44,614 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:44,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 447 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:25:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 21:25:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-06 21:25:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 17 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 21:25:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-04-06 21:25:44,625 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 101 [2022-04-06 21:25:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:44,625 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-04-06 21:25:44,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:25:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-04-06 21:25:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 21:25:44,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:44,626 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:44,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:44,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:44,827 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2038312229, now seen corresponding path program 25 times [2022-04-06 21:25:44,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [614006569] [2022-04-06 21:25:44,829 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:44,829 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:44,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2038312229, now seen corresponding path program 26 times [2022-04-06 21:25:44,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:44,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690014795] [2022-04-06 21:25:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:44,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:44,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:44,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558045937] [2022-04-06 21:25:44,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:25:44,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:44,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:44,838 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:44,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:25:45,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:25:45,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:45,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 21:25:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 28 proven. 273 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 21:25:45,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:46,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:46,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690014795] [2022-04-06 21:25:46,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:46,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558045937] [2022-04-06 21:25:46,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558045937] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:46,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:46,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-04-06 21:25:46,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:46,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [614006569] [2022-04-06 21:25:46,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [614006569] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:46,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:46,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:25:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121003192] [2022-04-06 21:25:46,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:46,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:25:46,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:25:46,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:25:46,041 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 21:25:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:46,467 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-04-06 21:25:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:25:46,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 108 [2022-04-06 21:25:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:46,468 INFO L225 Difference]: With dead ends: 69 [2022-04-06 21:25:46,468 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 21:25:46,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:25:46,469 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:46,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 492 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:25:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 21:25:46,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-06 21:25:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 21:25:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-06 21:25:46,480 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 108 [2022-04-06 21:25:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:46,481 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-06 21:25:46,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 21:25:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-06 21:25:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 21:25:46,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:46,484 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:46,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:46,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 21:25:46,688 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:46,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1009450414, now seen corresponding path program 27 times [2022-04-06 21:25:46,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:46,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1836481240] [2022-04-06 21:25:46,690 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:46,690 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:46,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1009450414, now seen corresponding path program 28 times [2022-04-06 21:25:46,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:46,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611196367] [2022-04-06 21:25:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:46,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:46,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:46,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397634190] [2022-04-06 21:25:46,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:25:46,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:46,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:46,699 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:46,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:25:47,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:25:47,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 21:25:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 21:25:48,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:48,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:48,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611196367] [2022-04-06 21:25:48,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:48,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397634190] [2022-04-06 21:25:48,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397634190] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:48,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:48,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-04-06 21:25:48,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:48,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1836481240] [2022-04-06 21:25:48,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1836481240] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:48,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:48,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:25:48,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404155856] [2022-04-06 21:25:48,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:48,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:25:48,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:25:48,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:25:48,418 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 21:25:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:48,952 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-04-06 21:25:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:25:48,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 115 [2022-04-06 21:25:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:48,954 INFO L225 Difference]: With dead ends: 72 [2022-04-06 21:25:48,954 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 21:25:48,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:25:48,954 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:48,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 539 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:25:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 21:25:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-06 21:25:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 19 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 21:25:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-04-06 21:25:48,965 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 115 [2022-04-06 21:25:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:48,965 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-04-06 21:25:48,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 21:25:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-04-06 21:25:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 21:25:48,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:48,966 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:48,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:49,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:25:49,180 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash -374771579, now seen corresponding path program 29 times [2022-04-06 21:25:49,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:49,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1886188588] [2022-04-06 21:25:49,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:49,183 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash -374771579, now seen corresponding path program 30 times [2022-04-06 21:25:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:49,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100787501] [2022-04-06 21:25:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:49,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:49,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:49,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683122210] [2022-04-06 21:25:49,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:25:49,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:49,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:49,192 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:49,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:25:49,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 21:25:49,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:49,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 21:25:49,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 21:25:50,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:50,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:50,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100787501] [2022-04-06 21:25:50,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:50,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683122210] [2022-04-06 21:25:50,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683122210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:50,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:50,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-06 21:25:50,305 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:50,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1886188588] [2022-04-06 21:25:50,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1886188588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:50,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:50,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:25:50,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833514785] [2022-04-06 21:25:50,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:50,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:25:50,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:50,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:25:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:25:50,307 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 21:25:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:50,885 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-04-06 21:25:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:25:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 122 [2022-04-06 21:25:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:50,887 INFO L225 Difference]: With dead ends: 75 [2022-04-06 21:25:50,887 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 21:25:50,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:25:50,888 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:50,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 588 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:25:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 21:25:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 21:25:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 20 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:25:50,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-04-06 21:25:50,897 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 122 [2022-04-06 21:25:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:50,898 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-04-06 21:25:50,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 21:25:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-04-06 21:25:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 21:25:50,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:50,899 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:50,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:51,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 21:25:51,100 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:51,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1065798926, now seen corresponding path program 31 times [2022-04-06 21:25:51,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:51,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572461840] [2022-04-06 21:25:51,102 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:51,102 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1065798926, now seen corresponding path program 32 times [2022-04-06 21:25:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:51,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97788386] [2022-04-06 21:25:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:51,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:51,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:51,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324761999] [2022-04-06 21:25:51,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:25:51,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:51,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:51,111 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:51,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:25:51,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:25:51,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 21:25:51,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 21:25:52,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:52,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97788386] [2022-04-06 21:25:52,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324761999] [2022-04-06 21:25:52,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324761999] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:52,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:52,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-04-06 21:25:52,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:52,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572461840] [2022-04-06 21:25:52,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572461840] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:52,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:52,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:25:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282737859] [2022-04-06 21:25:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:52,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:25:52,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:25:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:25:52,426 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:25:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:52,995 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2022-04-06 21:25:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:25:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 129 [2022-04-06 21:25:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:52,996 INFO L225 Difference]: With dead ends: 78 [2022-04-06 21:25:52,996 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 21:25:52,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:25:52,997 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:52,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 639 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:25:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 21:25:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-06 21:25:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 21 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:25:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2022-04-06 21:25:53,008 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 129 [2022-04-06 21:25:53,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:53,008 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2022-04-06 21:25:53,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:25:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2022-04-06 21:25:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-04-06 21:25:53,010 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:53,010 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:53,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:53,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:53,216 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1370180581, now seen corresponding path program 33 times [2022-04-06 21:25:53,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:53,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [559452696] [2022-04-06 21:25:53,219 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:53,219 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1370180581, now seen corresponding path program 34 times [2022-04-06 21:25:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:53,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599858763] [2022-04-06 21:25:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:53,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:53,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:53,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266713435] [2022-04-06 21:25:53,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:25:53,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:53,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:53,228 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:53,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 21:25:54,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:25:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:54,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 21:25:54,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 21:25:54,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:55,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:55,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599858763] [2022-04-06 21:25:55,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:55,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266713435] [2022-04-06 21:25:55,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266713435] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:55,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:55,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-06 21:25:55,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:55,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [559452696] [2022-04-06 21:25:55,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [559452696] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:55,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:55,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:25:55,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812006712] [2022-04-06 21:25:55,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:55,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:25:55,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:55,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:25:55,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:25:55,142 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:25:55,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:55,763 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2022-04-06 21:25:55,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:25:55,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 136 [2022-04-06 21:25:55,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:55,764 INFO L225 Difference]: With dead ends: 81 [2022-04-06 21:25:55,764 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 21:25:55,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:25:55,765 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:55,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 692 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:25:55,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 21:25:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-04-06 21:25:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 22 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:25:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-04-06 21:25:55,777 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 136 [2022-04-06 21:25:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:55,777 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-04-06 21:25:55,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:25:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-04-06 21:25:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 21:25:55,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:55,779 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:55,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:55,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:55,988 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:55,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:55,988 INFO L85 PathProgramCache]: Analyzing trace with hash 455854994, now seen corresponding path program 35 times [2022-04-06 21:25:55,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:55,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1400326710] [2022-04-06 21:25:55,990 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:55,990 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:55,990 INFO L85 PathProgramCache]: Analyzing trace with hash 455854994, now seen corresponding path program 36 times [2022-04-06 21:25:55,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:55,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837072591] [2022-04-06 21:25:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:55,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:55,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:55,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902357421] [2022-04-06 21:25:55,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:25:55,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:55,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:55,999 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:56,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 21:25:57,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 21:25:57,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 21:25:57,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:25:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-04-06 21:25:58,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:25:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:25:58,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837072591] [2022-04-06 21:25:58,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:25:58,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902357421] [2022-04-06 21:25:58,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902357421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:25:58,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:25:58,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-04-06 21:25:58,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:25:58,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1400326710] [2022-04-06 21:25:58,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1400326710] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:25:58,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:25:58,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 21:25:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410230535] [2022-04-06 21:25:58,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:25:58,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 21:25:58,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 21:25:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:25:58,540 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:25:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:25:59,232 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2022-04-06 21:25:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:25:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 143 [2022-04-06 21:25:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:25:59,233 INFO L225 Difference]: With dead ends: 84 [2022-04-06 21:25:59,233 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 21:25:59,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:25:59,234 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:25:59,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 747 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:25:59,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 21:25:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-04-06 21:25:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 23 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 21:25:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2022-04-06 21:25:59,245 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 143 [2022-04-06 21:25:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:25:59,246 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2022-04-06 21:25:59,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:25:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2022-04-06 21:25:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-04-06 21:25:59,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:25:59,247 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:25:59,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 21:25:59,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 21:25:59,451 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:25:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:25:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1978024123, now seen corresponding path program 37 times [2022-04-06 21:25:59,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:25:59,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [379457361] [2022-04-06 21:25:59,455 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:25:59,455 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:25:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1978024123, now seen corresponding path program 38 times [2022-04-06 21:25:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:25:59,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964110726] [2022-04-06 21:25:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:25:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:25:59,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:25:59,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201857073] [2022-04-06 21:25:59,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:25:59,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:25:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:25:59,468 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:25:59,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 21:25:59,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:25:59,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:25:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 21:25:59,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 21:26:00,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:00,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964110726] [2022-04-06 21:26:00,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201857073] [2022-04-06 21:26:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201857073] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:00,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:00,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-04-06 21:26:00,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [379457361] [2022-04-06 21:26:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [379457361] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:00,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:00,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:26:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595533308] [2022-04-06 21:26:00,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:00,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:26:00,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:26:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:26:00,753 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 21:26:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:01,477 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2022-04-06 21:26:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 21:26:01,479 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 150 [2022-04-06 21:26:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:01,480 INFO L225 Difference]: With dead ends: 87 [2022-04-06 21:26:01,480 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 21:26:01,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:26:01,482 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:01,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 804 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:26:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 21:26:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-06 21:26:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 24 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 21:26:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-04-06 21:26:01,509 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 150 [2022-04-06 21:26:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:01,509 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-04-06 21:26:01,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 21:26:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-04-06 21:26:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 21:26:01,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:01,511 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:01,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:26:01,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:26:01,718 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:01,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1184287794, now seen corresponding path program 39 times [2022-04-06 21:26:01,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:01,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1028406731] [2022-04-06 21:26:01,720 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:01,720 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1184287794, now seen corresponding path program 40 times [2022-04-06 21:26:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775090727] [2022-04-06 21:26:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:01,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:01,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:01,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068698706] [2022-04-06 21:26:01,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:26:01,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:01,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:01,728 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:01,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 21:26:03,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:26:03,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 21:26:03,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 21:26:03,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:04,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775090727] [2022-04-06 21:26:04,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068698706] [2022-04-06 21:26:04,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068698706] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:04,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:04,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-04-06 21:26:04,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1028406731] [2022-04-06 21:26:04,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1028406731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:04,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:04,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 21:26:04,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644502338] [2022-04-06 21:26:04,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:04,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 21:26:04,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 21:26:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:26:04,069 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 21:26:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:04,847 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-04-06 21:26:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:26:04,847 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 157 [2022-04-06 21:26:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:04,848 INFO L225 Difference]: With dead ends: 90 [2022-04-06 21:26:04,848 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 21:26:04,848 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:26:04,849 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:04,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 863 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:26:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 21:26:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-06 21:26:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:26:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2022-04-06 21:26:04,862 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 157 [2022-04-06 21:26:04,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:04,862 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2022-04-06 21:26:04,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 21:26:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2022-04-06 21:26:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-04-06 21:26:04,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:04,864 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:04,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:26:05,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:05,072 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:05,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1391801691, now seen corresponding path program 41 times [2022-04-06 21:26:05,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:05,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2010290902] [2022-04-06 21:26:05,074 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:05,074 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:05,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1391801691, now seen corresponding path program 42 times [2022-04-06 21:26:05,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:05,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483539662] [2022-04-06 21:26:05,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:05,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:05,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:05,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878193935] [2022-04-06 21:26:05,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:26:05,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:05,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:05,091 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:05,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 21:26:06,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 21:26:06,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:06,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 21:26:06,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-06 21:26:06,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:07,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:07,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483539662] [2022-04-06 21:26:07,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:07,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878193935] [2022-04-06 21:26:07,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878193935] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:07,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:07,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-04-06 21:26:07,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:07,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2010290902] [2022-04-06 21:26:07,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2010290902] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:07,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:07,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:26:07,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854928068] [2022-04-06 21:26:07,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:07,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:26:07,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:07,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:26:07,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:26:07,033 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:26:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:07,877 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2022-04-06 21:26:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 21:26:07,877 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 164 [2022-04-06 21:26:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:07,879 INFO L225 Difference]: With dead ends: 93 [2022-04-06 21:26:07,879 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 21:26:07,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-04-06 21:26:07,880 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:07,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 924 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 21:26:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 21:26:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-06 21:26:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 26 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:26:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-04-06 21:26:07,893 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 164 [2022-04-06 21:26:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:07,894 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-04-06 21:26:07,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:26:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-04-06 21:26:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 21:26:07,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:07,895 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:07,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 21:26:08,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:08,103 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1008454446, now seen corresponding path program 43 times [2022-04-06 21:26:08,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:08,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [975627504] [2022-04-06 21:26:08,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:08,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1008454446, now seen corresponding path program 44 times [2022-04-06 21:26:08,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:08,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158890161] [2022-04-06 21:26:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:08,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:08,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:08,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785237476] [2022-04-06 21:26:08,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:26:08,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:08,115 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:08,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 21:26:08,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:26:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 21:26:08,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-04-06 21:26:09,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:09,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:09,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158890161] [2022-04-06 21:26:09,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:09,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785237476] [2022-04-06 21:26:09,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785237476] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:09,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:09,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-04-06 21:26:09,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:09,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [975627504] [2022-04-06 21:26:09,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [975627504] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:09,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:09,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 21:26:09,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458402764] [2022-04-06 21:26:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:09,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 21:26:09,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:09,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 21:26:09,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:26:09,692 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:26:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:10,627 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-04-06 21:26:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:26:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 171 [2022-04-06 21:26:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:10,628 INFO L225 Difference]: With dead ends: 96 [2022-04-06 21:26:10,628 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 21:26:10,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:26:10,629 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:10,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 987 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:26:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 21:26:10,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-04-06 21:26:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 27 states have call successors, (27), 5 states have call predecessors, (27), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 21:26:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-04-06 21:26:10,642 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 171 [2022-04-06 21:26:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:10,642 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-04-06 21:26:10,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:26:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-04-06 21:26:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-04-06 21:26:10,644 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:10,644 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:10,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 21:26:10,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 21:26:10,850 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1981050373, now seen corresponding path program 45 times [2022-04-06 21:26:10,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:10,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [250067245] [2022-04-06 21:26:10,852 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:10,852 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1981050373, now seen corresponding path program 46 times [2022-04-06 21:26:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:10,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873493394] [2022-04-06 21:26:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:10,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:10,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:10,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072201356] [2022-04-06 21:26:10,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:26:10,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:10,862 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:10,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 21:26:12,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:26:12,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 21:26:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-04-06 21:26:13,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:13,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:13,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873493394] [2022-04-06 21:26:13,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:13,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072201356] [2022-04-06 21:26:13,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072201356] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:13,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:13,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-04-06 21:26:13,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:13,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [250067245] [2022-04-06 21:26:13,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [250067245] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:13,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:13,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:26:13,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341611584] [2022-04-06 21:26:13,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:13,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:26:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:13,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:26:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-04-06 21:26:13,478 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 21:26:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:14,469 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2022-04-06 21:26:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 21:26:14,470 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 178 [2022-04-06 21:26:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:14,470 INFO L225 Difference]: With dead ends: 99 [2022-04-06 21:26:14,471 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 21:26:14,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:26:14,472 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 1982 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:14,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1052 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1982 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:26:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 21:26:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-04-06 21:26:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 28 states have call successors, (28), 5 states have call predecessors, (28), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 21:26:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 117 transitions. [2022-04-06 21:26:14,486 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 117 transitions. Word has length 178 [2022-04-06 21:26:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:14,487 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 117 transitions. [2022-04-06 21:26:14,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 21:26:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 117 transitions. [2022-04-06 21:26:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 21:26:14,488 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:14,488 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:14,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 21:26:14,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 21:26:14,692 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1027734158, now seen corresponding path program 47 times [2022-04-06 21:26:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212205905] [2022-04-06 21:26:14,695 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:14,695 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:14,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1027734158, now seen corresponding path program 48 times [2022-04-06 21:26:14,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:14,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739896856] [2022-04-06 21:26:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:14,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:14,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:14,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090580046] [2022-04-06 21:26:14,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:26:14,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:14,703 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:14,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 21:26:18,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 21:26:18,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:18,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 21:26:18,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-04-06 21:26:18,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:18,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:18,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739896856] [2022-04-06 21:26:18,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:18,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090580046] [2022-04-06 21:26:18,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090580046] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:18,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:18,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-04-06 21:26:18,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:18,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212205905] [2022-04-06 21:26:18,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212205905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:18,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:18,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 21:26:18,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884397214] [2022-04-06 21:26:18,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:18,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 21:26:18,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 21:26:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:26:18,971 INFO L87 Difference]: Start difference. First operand 94 states and 117 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 21:26:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:20,094 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2022-04-06 21:26:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:26:20,094 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 185 [2022-04-06 21:26:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:20,095 INFO L225 Difference]: With dead ends: 102 [2022-04-06 21:26:20,095 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 21:26:20,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:26:20,096 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:20,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1119 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 21:26:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 21:26:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-04-06 21:26:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 29 states have call successors, (29), 5 states have call predecessors, (29), 3 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 21:26:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2022-04-06 21:26:20,111 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 185 [2022-04-06 21:26:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:20,111 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2022-04-06 21:26:20,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 21:26:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2022-04-06 21:26:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-04-06 21:26:20,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:20,113 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:20,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 21:26:20,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 21:26:20,321 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1572034203, now seen corresponding path program 49 times [2022-04-06 21:26:20,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:20,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [631162992] [2022-04-06 21:26:20,324 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:20,324 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1572034203, now seen corresponding path program 50 times [2022-04-06 21:26:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:20,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553128107] [2022-04-06 21:26:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:20,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:20,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5046456] [2022-04-06 21:26:20,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:26:20,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:20,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:20,334 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:20,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 21:26:21,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:26:21,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:21,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 21:26:21,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-06 21:26:22,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:22,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:22,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553128107] [2022-04-06 21:26:22,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:22,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5046456] [2022-04-06 21:26:22,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5046456] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:22,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:22,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-04-06 21:26:22,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:22,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [631162992] [2022-04-06 21:26:22,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [631162992] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:22,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:22,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:26:22,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591875962] [2022-04-06 21:26:22,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:22,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:26:22,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:26:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:26:22,592 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 21:26:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:23,862 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2022-04-06 21:26:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 21:26:23,863 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 192 [2022-04-06 21:26:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:23,864 INFO L225 Difference]: With dead ends: 105 [2022-04-06 21:26:23,864 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 21:26:23,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 21:26:23,864 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:23,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1188 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:26:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 21:26:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 21:26:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 30 states have call successors, (30), 5 states have call predecessors, (30), 3 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 21:26:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-04-06 21:26:23,880 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 192 [2022-04-06 21:26:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:23,880 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-04-06 21:26:23,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 21:26:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-04-06 21:26:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 21:26:23,882 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:23,882 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:23,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 21:26:24,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 21:26:24,089 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:24,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1051836910, now seen corresponding path program 51 times [2022-04-06 21:26:24,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:24,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133139771] [2022-04-06 21:26:24,091 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:24,091 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1051836910, now seen corresponding path program 52 times [2022-04-06 21:26:24,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:24,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947282562] [2022-04-06 21:26:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:24,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:24,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:24,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739241126] [2022-04-06 21:26:24,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:26:24,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:24,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:24,102 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:24,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 21:26:28,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:26:28,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:28,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 112 conjunts are in the unsatisfiable core [2022-04-06 21:26:28,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-06 21:26:29,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:29,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:29,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947282562] [2022-04-06 21:26:29,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:29,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739241126] [2022-04-06 21:26:29,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739241126] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:29,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:29,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-04-06 21:26:29,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133139771] [2022-04-06 21:26:29,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133139771] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:29,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:29,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 21:26:29,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691184840] [2022-04-06 21:26:29,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:29,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 21:26:29,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 21:26:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:26:29,639 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 21:26:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:30,822 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2022-04-06 21:26:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:26:30,823 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 199 [2022-04-06 21:26:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:30,824 INFO L225 Difference]: With dead ends: 108 [2022-04-06 21:26:30,824 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 21:26:30,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:26:30,825 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:30,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1259 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 21:26:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 21:26:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 21:26:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 31 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:26:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2022-04-06 21:26:30,839 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 199 [2022-04-06 21:26:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:30,839 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2022-04-06 21:26:30,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 21:26:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2022-04-06 21:26:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-04-06 21:26:30,840 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:30,841 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:30,850 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 21:26:31,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 21:26:31,047 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:31,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1346993349, now seen corresponding path program 53 times [2022-04-06 21:26:31,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:31,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2101231132] [2022-04-06 21:26:31,050 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:31,050 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1346993349, now seen corresponding path program 54 times [2022-04-06 21:26:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:31,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973972712] [2022-04-06 21:26:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:31,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:31,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:31,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24917134] [2022-04-06 21:26:31,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:26:31,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:31,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:31,058 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:31,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 21:26:40,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 21:26:40,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 116 conjunts are in the unsatisfiable core [2022-04-06 21:26:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-04-06 21:26:41,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:41,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:41,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973972712] [2022-04-06 21:26:41,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:41,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24917134] [2022-04-06 21:26:41,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24917134] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:41,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:41,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-04-06 21:26:41,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:41,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2101231132] [2022-04-06 21:26:41,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2101231132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:41,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:41,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:26:41,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750653572] [2022-04-06 21:26:41,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:41,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:26:41,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:41,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:26:41,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 21:26:41,821 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 30 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:26:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:43,113 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2022-04-06 21:26:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 21:26:43,113 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 30 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 206 [2022-04-06 21:26:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:43,114 INFO L225 Difference]: With dead ends: 111 [2022-04-06 21:26:43,114 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 21:26:43,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 21:26:43,115 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:43,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1332 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2646 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:26:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 21:26:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-06 21:26:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 32 states have call successors, (32), 5 states have call predecessors, (32), 3 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:26:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2022-04-06 21:26:43,128 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 206 [2022-04-06 21:26:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:43,129 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2022-04-06 21:26:43,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 30 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:26:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2022-04-06 21:26:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 21:26:43,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:43,130 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:43,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 21:26:43,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:43,331 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:43,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash 742317746, now seen corresponding path program 55 times [2022-04-06 21:26:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:43,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761561019] [2022-04-06 21:26:43,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:43,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash 742317746, now seen corresponding path program 56 times [2022-04-06 21:26:43,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:43,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804893474] [2022-04-06 21:26:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:43,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:43,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:43,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139794899] [2022-04-06 21:26:43,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:26:43,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:43,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:43,347 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:43,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 21:26:44,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:26:44,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:44,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 120 conjunts are in the unsatisfiable core [2022-04-06 21:26:44,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-04-06 21:26:45,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:45,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804893474] [2022-04-06 21:26:45,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139794899] [2022-04-06 21:26:45,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139794899] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:45,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:45,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-04-06 21:26:45,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761561019] [2022-04-06 21:26:45,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761561019] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:45,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:45,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 21:26:45,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384991960] [2022-04-06 21:26:45,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:45,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 21:26:45,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:45,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 21:26:45,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:26:45,307 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:26:46,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:46,660 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2022-04-06 21:26:46,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:26:46,660 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 213 [2022-04-06 21:26:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:46,661 INFO L225 Difference]: With dead ends: 114 [2022-04-06 21:26:46,661 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 21:26:46,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:26:46,662 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:46,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1407 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2827 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:26:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 21:26:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-04-06 21:26:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 33 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 21:26:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-04-06 21:26:46,675 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 213 [2022-04-06 21:26:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:46,675 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-04-06 21:26:46,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:26:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-04-06 21:26:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-04-06 21:26:46,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:46,677 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:46,691 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 21:26:46,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 21:26:46,885 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:46,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1612769317, now seen corresponding path program 57 times [2022-04-06 21:26:46,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:46,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [382520241] [2022-04-06 21:26:46,888 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:46,888 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1612769317, now seen corresponding path program 58 times [2022-04-06 21:26:46,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:46,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123819243] [2022-04-06 21:26:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:46,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:46,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412056788] [2022-04-06 21:26:46,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:26:46,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:46,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:46,899 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:46,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 21:26:53,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:26:53,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:26:53,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 124 conjunts are in the unsatisfiable core [2022-04-06 21:26:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:26:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-04-06 21:26:54,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:26:54,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:26:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123819243] [2022-04-06 21:26:54,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:26:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412056788] [2022-04-06 21:26:54,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412056788] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:26:54,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:26:54,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-04-06 21:26:54,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:26:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [382520241] [2022-04-06 21:26:54,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [382520241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:26:54,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:26:54,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:26:54,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104232178] [2022-04-06 21:26:54,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:26:54,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:26:54,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:54,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:26:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 21:26:54,269 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 32 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 21:26:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:26:55,710 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2022-04-06 21:26:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 21:26:55,711 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 32 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 220 [2022-04-06 21:26:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:26:55,714 INFO L225 Difference]: With dead ends: 117 [2022-04-06 21:26:55,714 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 21:26:55,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 21:26:55,715 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 2 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 3014 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:26:55,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1484 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3014 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 21:26:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 21:26:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-04-06 21:26:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 34 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 21:26:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 141 transitions. [2022-04-06 21:26:55,733 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 141 transitions. Word has length 220 [2022-04-06 21:26:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:26:55,733 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 141 transitions. [2022-04-06 21:26:55,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 32 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 21:26:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 141 transitions. [2022-04-06 21:26:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 21:26:55,734 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:26:55,735 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:26:55,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 21:26:55,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:55,936 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:26:55,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:26:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash -21371054, now seen corresponding path program 59 times [2022-04-06 21:26:55,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:26:55,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1535288609] [2022-04-06 21:26:55,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:26:55,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:26:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash -21371054, now seen corresponding path program 60 times [2022-04-06 21:26:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:26:55,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006570868] [2022-04-06 21:26:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:26:55,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:26:55,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:26:55,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002335301] [2022-04-06 21:26:55,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:26:55,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:26:55,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:26:55,951 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:26:55,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 21:27:05,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-04-06 21:27:05,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:27:05,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 129 conjunts are in the unsatisfiable core [2022-04-06 21:27:05,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:27:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-04-06 21:27:06,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:27:10,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:27:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006570868] [2022-04-06 21:27:10,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:27:10,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002335301] [2022-04-06 21:27:10,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002335301] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:27:10,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:27:10,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-04-06 21:27:10,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:27:10,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1535288609] [2022-04-06 21:27:10,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1535288609] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:27:10,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:27:10,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 21:27:10,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413787602] [2022-04-06 21:27:10,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:27:10,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 21:27:10,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:27:10,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 21:27:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=3516, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 21:27:10,180 INFO L87 Difference]: Start difference. First operand 112 states and 141 transitions. Second operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 21:27:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:27:11,799 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2022-04-06 21:27:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:27:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 227 [2022-04-06 21:27:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:27:11,801 INFO L225 Difference]: With dead ends: 120 [2022-04-06 21:27:11,802 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 21:27:11,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1050, Invalid=3780, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 21:27:11,803 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 3207 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 3207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:27:11,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1563 Invalid, 3207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3207 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 21:27:11,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 21:27:11,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-04-06 21:27:11,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 35 states have call successors, (35), 5 states have call predecessors, (35), 3 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 21:27:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2022-04-06 21:27:11,823 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 227 [2022-04-06 21:27:11,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:27:11,824 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2022-04-06 21:27:11,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 21:27:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2022-04-06 21:27:11,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-04-06 21:27:11,825 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:27:11,825 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:27:11,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 21:27:12,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:27:12,039 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:27:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:27:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash -748098683, now seen corresponding path program 61 times [2022-04-06 21:27:12,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:27:12,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012821837] [2022-04-06 21:27:12,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:27:12,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:27:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash -748098683, now seen corresponding path program 62 times [2022-04-06 21:27:12,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:27:12,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258249228] [2022-04-06 21:27:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:27:12,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:27:12,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:27:12,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981763308] [2022-04-06 21:27:12,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:27:12,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:27:12,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:27:12,065 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:27:12,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 21:27:13,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:27:13,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:27:13,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 21:27:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:27:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-04-06 21:27:14,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:27:17,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:27:17,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258249228] [2022-04-06 21:27:17,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:27:17,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981763308] [2022-04-06 21:27:17,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981763308] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:27:17,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:27:17,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-04-06 21:27:17,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:27:17,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012821837] [2022-04-06 21:27:17,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012821837] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:27:17,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:27:17,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:27:17,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987839412] [2022-04-06 21:27:17,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:27:17,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:27:17,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:27:17,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:27:17,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=3725, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 21:27:17,842 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 34 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 21:27:19,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:27:19,559 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2022-04-06 21:27:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 21:27:19,559 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 34 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 234 [2022-04-06 21:27:19,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:27:19,563 INFO L225 Difference]: With dead ends: 123 [2022-04-06 21:27:19,563 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 21:27:19,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 387 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1115, Invalid=3997, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 21:27:19,564 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 3406 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:27:19,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1644 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3406 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 21:27:19,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 21:27:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-04-06 21:27:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 36 states have call successors, (36), 5 states have call predecessors, (36), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 21:27:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2022-04-06 21:27:19,584 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 234 [2022-04-06 21:27:19,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:27:19,585 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2022-04-06 21:27:19,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 34 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 21:27:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2022-04-06 21:27:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-04-06 21:27:19,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:27:19,586 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:27:19,597 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 21:27:19,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 21:27:19,794 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:27:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:27:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1651070962, now seen corresponding path program 63 times [2022-04-06 21:27:19,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:27:19,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1153716949] [2022-04-06 21:27:19,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:27:19,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:27:19,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1651070962, now seen corresponding path program 64 times [2022-04-06 21:27:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:27:19,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926943961] [2022-04-06 21:27:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:27:19,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:27:19,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:27:19,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518121809] [2022-04-06 21:27:19,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:27:19,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:27:19,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:27:19,809 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:27:19,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 21:27:38,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:27:38,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:27:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 136 conjunts are in the unsatisfiable core [2022-04-06 21:27:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:27:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-04-06 21:27:39,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:27:39,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:27:39,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926943961] [2022-04-06 21:27:39,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:27:39,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518121809] [2022-04-06 21:27:39,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518121809] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:27:39,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:27:39,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-04-06 21:27:39,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:27:39,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1153716949] [2022-04-06 21:27:39,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1153716949] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:27:39,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:27:39,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 21:27:39,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618124637] [2022-04-06 21:27:39,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:27:39,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 21:27:39,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:27:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 21:27:39,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:27:39,627 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 21:27:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:27:41,367 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2022-04-06 21:27:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:27:41,368 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 241 [2022-04-06 21:27:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:27:41,368 INFO L225 Difference]: With dead ends: 126 [2022-04-06 21:27:41,368 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 21:27:41,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:27:41,369 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 3611 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:27:41,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1727 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3611 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 21:27:41,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 21:27:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-04-06 21:27:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 37 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 21:27:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2022-04-06 21:27:41,390 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 241 [2022-04-06 21:27:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:27:41,390 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2022-04-06 21:27:41,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 21:27:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2022-04-06 21:27:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-04-06 21:27:41,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:27:41,392 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:27:41,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 21:27:41,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 21:27:41,615 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:27:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:27:41,615 INFO L85 PathProgramCache]: Analyzing trace with hash 758613733, now seen corresponding path program 65 times [2022-04-06 21:27:41,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:27:41,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [177083021] [2022-04-06 21:27:41,618 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:27:41,618 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:27:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash 758613733, now seen corresponding path program 66 times [2022-04-06 21:27:41,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:27:41,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145548937] [2022-04-06 21:27:41,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:27:41,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:27:41,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:27:41,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000915807] [2022-04-06 21:27:41,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:27:41,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:27:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:27:41,631 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:27:41,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 21:28:02,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-06 21:28:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 141 conjunts are in the unsatisfiable core [2022-04-06 21:28:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-04-06 21:28:03,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:08,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:08,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145548937] [2022-04-06 21:28:08,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:08,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000915807] [2022-04-06 21:28:08,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000915807] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:28:08,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:28:08,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-04-06 21:28:08,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:08,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [177083021] [2022-04-06 21:28:08,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [177083021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:08,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:08,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 21:28:08,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842388546] [2022-04-06 21:28:08,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:08,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 21:28:08,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 21:28:08,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=4161, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 21:28:08,036 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 36 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 21:28:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:09,965 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2022-04-06 21:28:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 21:28:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 36 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 248 [2022-04-06 21:28:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:09,966 INFO L225 Difference]: With dead ends: 129 [2022-04-06 21:28:09,966 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 21:28:09,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1251, Invalid=4449, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 21:28:09,967 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 2 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 3822 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 3822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:09,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1812 Invalid, 3822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3822 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 21:28:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 21:28:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-04-06 21:28:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 38 states have call successors, (38), 5 states have call predecessors, (38), 3 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 21:28:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2022-04-06 21:28:09,988 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 248 [2022-04-06 21:28:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:09,988 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2022-04-06 21:28:09,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 36 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 21:28:09,988 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2022-04-06 21:28:09,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-04-06 21:28:09,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:09,990 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:10,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:10,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 21:28:10,204 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1333211282, now seen corresponding path program 67 times [2022-04-06 21:28:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:10,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335657051] [2022-04-06 21:28:10,206 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:10,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:10,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1333211282, now seen corresponding path program 68 times [2022-04-06 21:28:10,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:10,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311167897] [2022-04-06 21:28:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:10,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:10,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:10,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349522290] [2022-04-06 21:28:10,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:10,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:10,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:10,217 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:10,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 21:28:11,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:28:11,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 144 conjunts are in the unsatisfiable core [2022-04-06 21:28:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-04-06 21:28:12,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:12,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:12,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311167897] [2022-04-06 21:28:12,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:12,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349522290] [2022-04-06 21:28:12,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349522290] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:28:12,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:28:12,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-04-06 21:28:12,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:12,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335657051] [2022-04-06 21:28:12,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335657051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:12,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:12,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 21:28:12,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338934717] [2022-04-06 21:28:12,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:12,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 21:28:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 21:28:12,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:28:12,778 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 37 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 21:28:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:14,983 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2022-04-06 21:28:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:28:14,984 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 37 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 255 [2022-04-06 21:28:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:14,985 INFO L225 Difference]: With dead ends: 132 [2022-04-06 21:28:14,985 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 21:28:14,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:28:14,985 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 4039 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 4039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:14,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1899 Invalid, 4039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4039 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 21:28:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 21:28:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-04-06 21:28:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 39 states have call successors, (39), 5 states have call predecessors, (39), 3 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 21:28:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 161 transitions. [2022-04-06 21:28:15,007 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 161 transitions. Word has length 255 [2022-04-06 21:28:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:15,008 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 161 transitions. [2022-04-06 21:28:15,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 37 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 21:28:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 161 transitions. [2022-04-06 21:28:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-04-06 21:28:15,009 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:15,009 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:15,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 21:28:15,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:15,217 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:15,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -769476027, now seen corresponding path program 69 times [2022-04-06 21:28:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:15,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2006963120] [2022-04-06 21:28:15,220 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:15,220 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash -769476027, now seen corresponding path program 70 times [2022-04-06 21:28:15,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:15,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135985890] [2022-04-06 21:28:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:15,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:15,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71908560] [2022-04-06 21:28:15,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:28:15,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:15,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:15,232 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:15,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 21:28:20,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:28:20,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:20,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 148 conjunts are in the unsatisfiable core [2022-04-06 21:28:20,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-04-06 21:28:21,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:21,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:21,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135985890] [2022-04-06 21:28:21,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:21,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71908560] [2022-04-06 21:28:21,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71908560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:28:21,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:28:21,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-04-06 21:28:21,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2006963120] [2022-04-06 21:28:21,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2006963120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:21,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:21,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 21:28:21,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628175350] [2022-04-06 21:28:21,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:21,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 21:28:21,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:21,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 21:28:21,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 21:28:21,537 INFO L87 Difference]: Start difference. First operand 127 states and 161 transitions. Second operand has 41 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 38 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 21:28:23,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:23,590 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2022-04-06 21:28:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 21:28:23,590 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 38 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 262 [2022-04-06 21:28:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:23,591 INFO L225 Difference]: With dead ends: 135 [2022-04-06 21:28:23,592 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 21:28:23,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 21:28:23,592 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 2 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 4262 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 4262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:23,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1988 Invalid, 4262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4262 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 21:28:23,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 21:28:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-04-06 21:28:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 40 states have call successors, (40), 5 states have call predecessors, (40), 3 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 21:28:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2022-04-06 21:28:23,614 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 262 [2022-04-06 21:28:23,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:23,614 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2022-04-06 21:28:23,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 38 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 21:28:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2022-04-06 21:28:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-04-06 21:28:23,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:23,616 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:23,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:23,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 21:28:23,827 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:23,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash 747467058, now seen corresponding path program 71 times [2022-04-06 21:28:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:23,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1673342257] [2022-04-06 21:28:23,829 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:23,829 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash 747467058, now seen corresponding path program 72 times [2022-04-06 21:28:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:23,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812559829] [2022-04-06 21:28:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:23,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:23,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:23,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281778087] [2022-04-06 21:28:23,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:28:23,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:23,838 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:23,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 21:28:32,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-04-06 21:28:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:32,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 152 conjunts are in the unsatisfiable core [2022-04-06 21:28:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 74 proven. 1998 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-04-06 21:28:33,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:33,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:33,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812559829] [2022-04-06 21:28:33,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:33,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281778087] [2022-04-06 21:28:33,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281778087] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:28:33,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:28:33,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-04-06 21:28:33,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:33,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1673342257] [2022-04-06 21:28:33,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1673342257] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:33,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:33,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 21:28:33,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547530458] [2022-04-06 21:28:33,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:33,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 21:28:33,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:33,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 21:28:33,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:28:33,469 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 39 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 21:28:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:35,563 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2022-04-06 21:28:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:28:35,563 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 39 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Word has length 269 [2022-04-06 21:28:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:35,564 INFO L225 Difference]: With dead ends: 138 [2022-04-06 21:28:35,564 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 21:28:35,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=2023, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:28:35,565 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 4491 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 4491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:35,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2079 Invalid, 4491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4491 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 21:28:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 21:28:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-04-06 21:28:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 41 states have call successors, (41), 5 states have call predecessors, (41), 3 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 21:28:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2022-04-06 21:28:35,581 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 269 [2022-04-06 21:28:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:35,581 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2022-04-06 21:28:35,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 39 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 21:28:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2022-04-06 21:28:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-04-06 21:28:35,583 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:35,583 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:35,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:35,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 21:28:35,795 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1749058981, now seen corresponding path program 73 times [2022-04-06 21:28:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:35,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [940322933] [2022-04-06 21:28:35,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:35,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:35,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1749058981, now seen corresponding path program 74 times [2022-04-06 21:28:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:35,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978319462] [2022-04-06 21:28:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:35,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869771580] [2022-04-06 21:28:35,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:35,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:35,805 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:35,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 21:28:37,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:28:37,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 156 conjunts are in the unsatisfiable core [2022-04-06 21:28:37,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 76 proven. 2109 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-04-06 21:28:38,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:38,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:38,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978319462] [2022-04-06 21:28:38,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:38,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869771580] [2022-04-06 21:28:38,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869771580] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:28:38,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:28:38,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2022-04-06 21:28:38,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:38,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [940322933] [2022-04-06 21:28:38,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [940322933] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:38,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:38,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 21:28:38,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063202927] [2022-04-06 21:28:38,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:38,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 21:28:38,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:38,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 21:28:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 21:28:38,625 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 40 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 21:28:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:40,853 INFO L93 Difference]: Finished difference Result 141 states and 178 transitions. [2022-04-06 21:28:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 21:28:40,854 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 40 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Word has length 276 [2022-04-06 21:28:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:40,855 INFO L225 Difference]: With dead ends: 141 [2022-04-06 21:28:40,855 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 21:28:40,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 21:28:40,856 INFO L913 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 2045 mSDsCounter, 0 mSdLazyCounter, 4726 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2172 SdHoareTripleChecker+Invalid, 4726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:40,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2172 Invalid, 4726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4726 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 21:28:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 21:28:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-04-06 21:28:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 42 states have call successors, (42), 5 states have call predecessors, (42), 3 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 21:28:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2022-04-06 21:28:40,874 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 276 [2022-04-06 21:28:40,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:40,874 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 173 transitions. [2022-04-06 21:28:40,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 40 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 21:28:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 173 transitions. [2022-04-06 21:28:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-04-06 21:28:40,876 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:40,876 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:40,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:41,084 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 21:28:41,084 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:41,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1859525074, now seen corresponding path program 75 times [2022-04-06 21:28:41,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:41,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7657062] [2022-04-06 21:28:41,087 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:41,087 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:41,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1859525074, now seen corresponding path program 76 times [2022-04-06 21:28:41,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:41,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294910206] [2022-04-06 21:28:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:41,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:41,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:41,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888308183] [2022-04-06 21:28:41,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:28:41,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:41,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:41,095 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:41,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 21:28:46,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:28:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:46,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 160 conjunts are in the unsatisfiable core [2022-04-06 21:28:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 78 proven. 2223 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2022-04-06 21:28:47,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:47,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:47,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294910206] [2022-04-06 21:28:47,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:47,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888308183] [2022-04-06 21:28:47,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888308183] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:28:47,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:28:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-04-06 21:28:47,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7657062] [2022-04-06 21:28:47,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7657062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:47,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 21:28:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122647202] [2022-04-06 21:28:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:47,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 21:28:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:47,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 21:28:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:28:47,643 INFO L87 Difference]: Start difference. First operand 136 states and 173 transitions. Second operand has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 41 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 21:28:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:49,856 INFO L93 Difference]: Finished difference Result 144 states and 182 transitions. [2022-04-06 21:28:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:28:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 41 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 283 [2022-04-06 21:28:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:49,857 INFO L225 Difference]: With dead ends: 144 [2022-04-06 21:28:49,858 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 21:28:49,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:28:49,858 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 2 mSDsluCounter, 2137 mSDsCounter, 0 mSdLazyCounter, 4967 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 4967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:49,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2267 Invalid, 4967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4967 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 21:28:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 21:28:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-04-06 21:28:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 43 states have call successors, (43), 5 states have call predecessors, (43), 3 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 21:28:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 177 transitions. [2022-04-06 21:28:49,876 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 177 transitions. Word has length 283 [2022-04-06 21:28:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:49,877 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 177 transitions. [2022-04-06 21:28:49,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 41 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 21:28:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 177 transitions. [2022-04-06 21:28:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-04-06 21:28:49,878 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:49,879 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:49,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 21:28:50,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-04-06 21:28:50,090 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash 925296901, now seen corresponding path program 77 times [2022-04-06 21:28:50,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:50,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807991403] [2022-04-06 21:28:50,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:50,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash 925296901, now seen corresponding path program 78 times [2022-04-06 21:28:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:50,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128878114] [2022-04-06 21:28:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:50,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:50,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683219811] [2022-04-06 21:28:50,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:28:50,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:50,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:50,105 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:50,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 21:29:04,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-04-06 21:29:04,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:29:04,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 176 conjunts are in the unsatisfiable core [2022-04-06 21:29:04,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:29:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5540 backedges. 306 proven. 2342 refuted. 0 times theorem prover too weak. 2892 trivial. 0 not checked. [2022-04-06 21:29:05,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:29:10,015 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0) (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-04-06 21:29:10,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:29:10,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128878114] [2022-04-06 21:29:10,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:29:10,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683219811] [2022-04-06 21:29:10,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683219811] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:29:10,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:29:10,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2022-04-06 21:29:10,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:29:10,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807991403] [2022-04-06 21:29:10,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807991403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:29:10,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:29:10,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 21:29:10,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122373649] [2022-04-06 21:29:10,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:29:10,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 21:29:10,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 21:29:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2699, Unknown=1, NotChecked=104, Total=2970 [2022-04-06 21:29:10,019 INFO L87 Difference]: Start difference. First operand 139 states and 177 transitions. Second operand has 49 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 46 states have internal predecessors, (92), 42 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 21:29:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:29:13,090 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2022-04-06 21:29:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:29:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 46 states have internal predecessors, (92), 42 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Word has length 290 [2022-04-06 21:29:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:29:13,091 INFO L225 Difference]: With dead ends: 151 [2022-04-06 21:29:13,092 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 21:29:13,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=187, Invalid=3008, Unknown=1, NotChecked=110, Total=3306 [2022-04-06 21:29:13,092 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 12 mSDsluCounter, 2159 mSDsCounter, 0 mSdLazyCounter, 5753 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 5756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:29:13,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2250 Invalid, 5756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5753 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 21:29:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 21:29:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-04-06 21:29:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 44 states have call successors, (44), 6 states have call predecessors, (44), 4 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 21:29:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-04-06 21:29:13,116 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 290 [2022-04-06 21:29:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:29:13,116 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-04-06 21:29:13,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 46 states have internal predecessors, (92), 42 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 21:29:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-04-06 21:29:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-04-06 21:29:13,118 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:29:13,118 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:29:13,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 21:29:13,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:29:13,331 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:29:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:29:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash 972761714, now seen corresponding path program 79 times [2022-04-06 21:29:13,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106359687] [2022-04-06 21:29:13,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:29:13,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:29:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash 972761714, now seen corresponding path program 80 times [2022-04-06 21:29:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:29:13,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613652553] [2022-04-06 21:29:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:29:13,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:29:13,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:29:13,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820793754] [2022-04-06 21:29:13,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:29:13,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:29:13,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:29:13,346 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:29:13,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 21:29:15,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:29:15,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:29:15,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 168 conjunts are in the unsatisfiable core [2022-04-06 21:29:15,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:29:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5822 backedges. 82 proven. 2460 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2022-04-06 21:29:16,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:29:17,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:29:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613652553] [2022-04-06 21:29:17,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:29:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820793754] [2022-04-06 21:29:17,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820793754] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:29:17,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:29:17,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2022-04-06 21:29:17,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:29:17,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1106359687] [2022-04-06 21:29:17,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1106359687] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:29:17,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:29:17,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 21:29:17,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957995268] [2022-04-06 21:29:17,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:29:17,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 21:29:17,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 21:29:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 21:29:17,161 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 43 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 21:29:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:29:19,737 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2022-04-06 21:29:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:29:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 43 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Word has length 297 [2022-04-06 21:29:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:29:19,738 INFO L225 Difference]: With dead ends: 154 [2022-04-06 21:29:19,739 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 21:29:19,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:29:19,739 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 5467 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 5467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:29:19,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2463 Invalid, 5467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5467 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 21:29:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 21:29:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-04-06 21:29:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 45 states have call successors, (45), 6 states have call predecessors, (45), 4 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 21:29:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2022-04-06 21:29:19,759 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 297 [2022-04-06 21:29:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:29:19,759 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2022-04-06 21:29:19,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 43 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 21:29:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2022-04-06 21:29:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-04-06 21:29:19,761 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:29:19,761 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:29:19,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 21:29:19,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:29:19,970 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:29:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:29:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2014583707, now seen corresponding path program 81 times [2022-04-06 21:29:19,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:19,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698260541] [2022-04-06 21:29:19,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:29:19,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:29:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2014583707, now seen corresponding path program 82 times [2022-04-06 21:29:19,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:29:19,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210816822] [2022-04-06 21:29:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:29:19,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:29:19,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:29:19,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426073264] [2022-04-06 21:29:19,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:29:19,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:29:19,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:29:19,983 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:29:19,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 21:31:04,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:31:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:04,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 172 conjunts are in the unsatisfiable core [2022-04-06 21:31:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6111 backedges. 84 proven. 2583 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2022-04-06 21:31:06,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:06,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210816822] [2022-04-06 21:31:06,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:06,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426073264] [2022-04-06 21:31:06,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426073264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:31:06,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:31:06,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2022-04-06 21:31:06,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:06,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698260541] [2022-04-06 21:31:06,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698260541] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:06,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:06,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 21:31:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167534157] [2022-04-06 21:31:06,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:06,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 21:31:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 21:31:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 21:31:06,306 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 44 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 21:31:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:09,150 INFO L93 Difference]: Finished difference Result 157 states and 197 transitions. [2022-04-06 21:31:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 21:31:09,150 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 44 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Word has length 304 [2022-04-06 21:31:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:09,151 INFO L225 Difference]: With dead ends: 157 [2022-04-06 21:31:09,152 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 21:31:09,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=2498, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 21:31:09,152 INFO L913 BasicCegarLoop]: 139 mSDtfsCounter, 2 mSDsluCounter, 2425 mSDsCounter, 0 mSdLazyCounter, 5726 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 5726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:09,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2564 Invalid, 5726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5726 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 21:31:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 21:31:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-04-06 21:31:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 46 states have call successors, (46), 6 states have call predecessors, (46), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 21:31:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 192 transitions. [2022-04-06 21:31:09,177 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 192 transitions. Word has length 304 [2022-04-06 21:31:09,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:09,178 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 192 transitions. [2022-04-06 21:31:09,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 44 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 21:31:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 192 transitions. [2022-04-06 21:31:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-04-06 21:31:09,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:09,179 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:09,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 21:31:09,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 21:31:09,395 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2532114, now seen corresponding path program 83 times [2022-04-06 21:31:09,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:09,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1800813365] [2022-04-06 21:31:09,397 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:31:09,397 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:31:09,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2532114, now seen corresponding path program 84 times [2022-04-06 21:31:09,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:09,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548367052] [2022-04-06 21:31:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:09,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:09,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:09,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937994096] [2022-04-06 21:31:09,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:31:09,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:09,406 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:09,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process