/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 15:00:58,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 15:00:58,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 15:00:58,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 15:00:58,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 15:00:58,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 15:00:58,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 15:00:58,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 15:00:58,936 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 15:00:58,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 15:00:58,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 15:00:58,937 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 15:00:58,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 15:00:58,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 15:00:58,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 15:00:58,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 15:00:58,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 15:00:58,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 15:00:58,938 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 15:00:58,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 15:00:58,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 15:00:58,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 15:00:58,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 15:00:58,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 15:00:58,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 15:00:58,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 15:00:58,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:00:58,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 15:00:58,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 15:00:58,940 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 15:00:58,940 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 15:00:58,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 15:00:58,940 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 15:00:58,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 15:00:59,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 15:00:59,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 15:00:59,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 15:00:59,167 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 15:00:59,168 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 15:00:59,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-06 15:00:59,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ab978e37/fdb50ec7bd694cfe8edb065a697010a7/FLAG757213a96 [2022-04-06 15:00:59,535 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 15:00:59,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-06 15:00:59,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ab978e37/fdb50ec7bd694cfe8edb065a697010a7/FLAG757213a96 [2022-04-06 15:00:59,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ab978e37/fdb50ec7bd694cfe8edb065a697010a7 [2022-04-06 15:00:59,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 15:00:59,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 15:00:59,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 15:00:59,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 15:00:59,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 15:00:59,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:00:59" (1/1) ... [2022-04-06 15:00:59,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@565ff239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:00:59, skipping insertion in model container [2022-04-06 15:00:59,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:00:59" (1/1) ... [2022-04-06 15:00:59,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 15:00:59,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 15:01:00,088 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-04-06 15:01:00,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:01:00,113 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 15:01:00,121 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-04-06 15:01:00,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:01:00,136 INFO L208 MainTranslator]: Completed translation [2022-04-06 15:01:00,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00 WrapperNode [2022-04-06 15:01:00,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 15:01:00,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 15:01:00,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 15:01:00,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 15:01:00,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00" (1/1) ... [2022-04-06 15:01:00,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00" (1/1) ... [2022-04-06 15:01:00,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00" (1/1) ... [2022-04-06 15:01:00,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00" (1/1) ... [2022-04-06 15:01:00,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00" (1/1) ... [2022-04-06 15:01:00,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00" (1/1) ... [2022-04-06 15:01:00,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00" (1/1) ... [2022-04-06 15:01:00,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 15:01:00,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 15:01:00,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 15:01:00,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 15:01:00,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00" (1/1) ... [2022-04-06 15:01:00,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:01:00,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:00,191 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 15:01:00,198 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 15:01:00,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 15:01:00,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 15:01:00,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 15:01:00,233 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 15:01:00,233 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-04-06 15:01:00,233 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-04-06 15:01:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 15:01:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 15:01:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 15:01:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 15:01:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 15:01:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 15:01:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 15:01:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-04-06 15:01:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-04-06 15:01:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 15:01:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 15:01:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 15:01:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 15:01:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 15:01:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 15:01:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 15:01:00,287 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 15:01:00,288 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 15:01:00,464 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 15:01:00,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 15:01:00,469 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 15:01:00,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:01:00 BoogieIcfgContainer [2022-04-06 15:01:00,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 15:01:00,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 15:01:00,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 15:01:00,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 15:01:00,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 03:00:59" (1/3) ... [2022-04-06 15:01:00,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb83e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:01:00, skipping insertion in model container [2022-04-06 15:01:00,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:01:00" (2/3) ... [2022-04-06 15:01:00,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb83e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:01:00, skipping insertion in model container [2022-04-06 15:01:00,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:01:00" (3/3) ... [2022-04-06 15:01:00,475 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-04-06 15:01:00,478 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 15:01:00,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 15:01:00,535 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 15:01:00,540 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 15:01:00,540 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 15:01:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 15:01:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 15:01:00,561 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:00,562 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:00,563 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:00,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:00,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 1 times [2022-04-06 15:01:00,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:00,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1671792737] [2022-04-06 15:01:00,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:01:00,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 2 times [2022-04-06 15:01:00,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:00,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302343471] [2022-04-06 15:01:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:00,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:01:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:00,798 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 15:01:00,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:00,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302343471] [2022-04-06 15:01:00,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302343471] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:00,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:00,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 15:01:00,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:00,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1671792737] [2022-04-06 15:01:00,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1671792737] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:00,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:00,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 15:01:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826544450] [2022-04-06 15:01:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:00,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 15:01:00,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 15:01:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:01:00,830 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 15:01:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:01,016 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-04-06 15:01:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 15:01:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 15:01:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:01,022 INFO L225 Difference]: With dead ends: 76 [2022-04-06 15:01:01,023 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 15:01:01,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:01:01,027 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:01,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:01:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 15:01:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 15:01:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 15:01:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-04-06 15:01:01,060 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-04-06 15:01:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:01,060 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-04-06 15:01:01,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 15:01:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-04-06 15:01:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 15:01:01,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:01,062 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:01,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 15:01:01,062 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:01,063 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 1 times [2022-04-06 15:01:01,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:01,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922384080] [2022-04-06 15:01:01,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:01:01,067 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 2 times [2022-04-06 15:01:01,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:01,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242443769] [2022-04-06 15:01:01,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:01,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:01,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:01:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:01,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:01:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:01,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:01:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:01,287 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 15:01:01,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:01,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242443769] [2022-04-06 15:01:01,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242443769] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:01,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:01,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:01:01,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:01,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922384080] [2022-04-06 15:01:01,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922384080] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:01,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:01,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:01:01,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619969468] [2022-04-06 15:01:01,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:01,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:01:01,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:01:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:01:01,290 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:01,579 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-04-06 15:01:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 15:01:01,584 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-06 15:01:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:01,588 INFO L225 Difference]: With dead ends: 50 [2022-04-06 15:01:01,588 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 15:01:01,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-04-06 15:01:01,590 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:01,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:01:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 15:01:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-06 15:01:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:01:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 15:01:01,611 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-04-06 15:01:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:01,611 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 15:01:01,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 15:01:01,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 15:01:01,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:01,614 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:01,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 15:01:01,614 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -310269904, now seen corresponding path program 1 times [2022-04-06 15:01:01,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:01,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1930606697] [2022-04-06 15:01:01,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:01:01,711 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash 470809425, now seen corresponding path program 1 times [2022-04-06 15:01:01,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:01,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177577686] [2022-04-06 15:01:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:01,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:01,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:01,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134894333] [2022-04-06 15:01:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:01,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:01,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:01,759 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 15:01:01,771 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 15:01:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:01,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 15:01:01,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:01,904 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 15:01:01,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:01:01,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:01,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177577686] [2022-04-06 15:01:01,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:01,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134894333] [2022-04-06 15:01:01,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134894333] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:01,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:01,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:01:01,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:01,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1930606697] [2022-04-06 15:01:01,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1930606697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:01,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:01,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:01:01,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385473518] [2022-04-06 15:01:01,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:01,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:01:01,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:01:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:01:02,000 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (5), 3 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 15:01:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:02,044 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-04-06 15:01:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:01:02,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-04-06 15:01:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:02,045 INFO L225 Difference]: With dead ends: 75 [2022-04-06 15:01:02,046 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 15:01:02,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:01:02,049 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:02,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 178 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:01:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 15:01:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 15:01:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:01:02,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-04-06 15:01:02,065 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 32 [2022-04-06 15:01:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:02,066 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-04-06 15:01:02,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (5), 3 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 15:01:02,066 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-04-06 15:01:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 15:01:02,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:02,067 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:02,088 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 15:01:02,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:02,288 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:02,289 INFO L85 PathProgramCache]: Analyzing trace with hash 440255005, now seen corresponding path program 1 times [2022-04-06 15:01:02,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:02,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [55024148] [2022-04-06 15:01:02,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:02,339 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:02,339 INFO L85 PathProgramCache]: Analyzing trace with hash 449898846, now seen corresponding path program 1 times [2022-04-06 15:01:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:02,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589828035] [2022-04-06 15:01:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:02,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:02,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:02,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369873028] [2022-04-06 15:01:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:02,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:02,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:02,358 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 15:01:02,359 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 15:01:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 15:01:02,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:02,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:01:02,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:02,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589828035] [2022-04-06 15:01:02,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:02,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369873028] [2022-04-06 15:01:02,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369873028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:02,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:02,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:01:02,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:02,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [55024148] [2022-04-06 15:01:02,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [55024148] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:02,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:02,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:01:02,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711259259] [2022-04-06 15:01:02,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:02,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 15:01:02,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 15:01:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:01:02,650 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 3 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 15:01:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:02,695 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-04-06 15:01:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 15:01:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-06 15:01:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:02,696 INFO L225 Difference]: With dead ends: 75 [2022-04-06 15:01:02,696 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 15:01:02,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-04-06 15:01:02,697 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:02,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 171 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:01:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 15:01:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 15:01:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:01:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-04-06 15:01:02,702 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 33 [2022-04-06 15:01:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:02,702 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-04-06 15:01:02,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 3 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 15:01:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-04-06 15:01:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 15:01:02,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:02,703 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:02,724 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 15:01:02,919 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,SelfDestructingSolverStorable3 [2022-04-06 15:01:02,919 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1367773279, now seen corresponding path program 1 times [2022-04-06 15:01:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:02,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640902449] [2022-04-06 15:01:02,971 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:02,971 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1673267454, now seen corresponding path program 1 times [2022-04-06 15:01:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429866101] [2022-04-06 15:01:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:02,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:02,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705753274] [2022-04-06 15:01:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:02,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:02,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:02,980 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 15:01:02,984 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 15:01:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:03,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 15:01:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 15:01:03,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:01:03,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:03,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429866101] [2022-04-06 15:01:03,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:03,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705753274] [2022-04-06 15:01:03,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705753274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:03,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:03,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:01:03,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:03,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640902449] [2022-04-06 15:01:03,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640902449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:03,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:03,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:01:03,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140335485] [2022-04-06 15:01:03,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:03,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 15:01:03,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:03,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 15:01:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:01:03,214 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:03,246 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-04-06 15:01:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 15:01:03,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-04-06 15:01:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:03,248 INFO L225 Difference]: With dead ends: 61 [2022-04-06 15:01:03,248 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 15:01:03,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:01:03,249 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 18 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:03,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 204 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-04-06 15:01:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 15:01:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 15:01:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:01:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-04-06 15:01:03,263 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2022-04-06 15:01:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:03,263 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-04-06 15:01:03,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-04-06 15:01:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 15:01:03,267 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:03,267 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:03,284 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 15:01:03,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:03,472 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948107, now seen corresponding path program 1 times [2022-04-06 15:01:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:03,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078284236] [2022-04-06 15:01:03,504 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:03,505 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1977046132, now seen corresponding path program 1 times [2022-04-06 15:01:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:03,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247273681] [2022-04-06 15:01:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:03,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:03,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:03,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108696679] [2022-04-06 15:01:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:03,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:03,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:03,513 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 15:01:03,514 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 15:01:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:03,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 15:01:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:03,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:01:03,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247273681] [2022-04-06 15:01:03,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108696679] [2022-04-06 15:01:03,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108696679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:03,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:03,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:01:03,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:03,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078284236] [2022-04-06 15:01:03,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078284236] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:03,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:03,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:01:03,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486098582] [2022-04-06 15:01:03,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:03,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 15:01:03,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:03,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 15:01:03,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:01:03,706 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:03,740 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-04-06 15:01:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 15:01:03,741 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-06 15:01:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:03,743 INFO L225 Difference]: With dead ends: 61 [2022-04-06 15:01:03,743 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 15:01:03,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:01:03,744 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:03,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 155 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-04-06 15:01:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 15:01:03,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 15:01:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:01:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-04-06 15:01:03,752 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 35 [2022-04-06 15:01:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:03,753 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-04-06 15:01:03,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-04-06 15:01:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 15:01:03,756 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:03,756 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:03,777 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 15:01:03,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:03,974 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:03,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1390786770, now seen corresponding path program 1 times [2022-04-06 15:01:03,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:03,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [480877324] [2022-04-06 15:01:04,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:04,002 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash -193092723, now seen corresponding path program 1 times [2022-04-06 15:01:04,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:04,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688708499] [2022-04-06 15:01:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:04,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:04,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:04,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720189334] [2022-04-06 15:01:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:04,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:04,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:04,010 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 15:01:04,011 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 15:01:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:01:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 15:01:10,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:01:10,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:10,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688708499] [2022-04-06 15:01:10,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:10,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720189334] [2022-04-06 15:01:10,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720189334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:10,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:10,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:01:20,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:20,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [480877324] [2022-04-06 15:01:20,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [480877324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:20,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:20,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 15:01:20,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342034126] [2022-04-06 15:01:20,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:20,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 15:01:20,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 15:01:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=455, Unknown=4, NotChecked=0, Total=552 [2022-04-06 15:01:20,293 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 22 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 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 15:01:20,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:20,360 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2022-04-06 15:01:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:01:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-04-06 15:01:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:20,361 INFO L225 Difference]: With dead ends: 66 [2022-04-06 15:01:20,361 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 15:01:20,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=93, Invalid=455, Unknown=4, NotChecked=0, Total=552 [2022-04-06 15:01:20,362 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:20,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 323 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-04-06 15:01:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 15:01:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-04-06 15:01:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 15:01:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-04-06 15:01:20,367 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 36 [2022-04-06 15:01:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:20,367 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-04-06 15:01:20,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (5), 3 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 15:01:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-04-06 15:01:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 15:01:20,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:20,370 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:20,389 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 15:01:20,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:20,576 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1295400781, now seen corresponding path program 1 times [2022-04-06 15:01:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:20,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1676924301] [2022-04-06 15:01:20,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:20,609 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:20,609 INFO L85 PathProgramCache]: Analyzing trace with hash 183395180, now seen corresponding path program 1 times [2022-04-06 15:01:20,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:20,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312229714] [2022-04-06 15:01:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:20,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:20,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:20,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458988082] [2022-04-06 15:01:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:20,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:20,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:20,628 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 15:01:20,629 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 15:01:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 15:01:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:20,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:01:20,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:20,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312229714] [2022-04-06 15:01:20,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:20,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458988082] [2022-04-06 15:01:20,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458988082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:20,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:20,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:01:20,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:20,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1676924301] [2022-04-06 15:01:20,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1676924301] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:20,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:20,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 15:01:20,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145334975] [2022-04-06 15:01:20,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:20,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 15:01:20,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:20,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 15:01:20,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:01:20,755 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:01:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:20,772 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-04-06 15:01:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 15:01:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-04-06 15:01:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:20,774 INFO L225 Difference]: With dead ends: 47 [2022-04-06 15:01:20,774 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 15:01:20,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:01:20,774 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:20,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 111 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:01:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 15:01:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 15:01:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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 15:01:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-04-06 15:01:20,780 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2022-04-06 15:01:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:20,781 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-04-06 15:01:20,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:01:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-04-06 15:01:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 15:01:20,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:20,781 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:20,803 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 15:01:21,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:21,004 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1443111891, now seen corresponding path program 1 times [2022-04-06 15:01:21,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:21,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103418964] [2022-04-06 15:01:21,028 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:21,028 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash -141792210, now seen corresponding path program 1 times [2022-04-06 15:01:21,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:21,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893791273] [2022-04-06 15:01:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:21,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:21,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:21,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264997767] [2022-04-06 15:01:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:21,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:21,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:21,043 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 15:01:21,044 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 15:01:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:21,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 15:01:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:21,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:21,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:21,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893791273] [2022-04-06 15:01:21,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:21,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264997767] [2022-04-06 15:01:21,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264997767] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:21,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:21,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 22 [2022-04-06 15:01:21,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:21,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103418964] [2022-04-06 15:01:21,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103418964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:21,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:21,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 15:01:21,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719895074] [2022-04-06 15:01:21,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:21,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 15:01:21,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:21,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 15:01:21,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-04-06 15:01:21,499 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:21,654 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2022-04-06 15:01:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 15:01:21,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-04-06 15:01:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:21,655 INFO L225 Difference]: With dead ends: 70 [2022-04-06 15:01:21,655 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 15:01:21,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-04-06 15:01:21,656 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:21,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 464 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:01:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 15:01:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-04-06 15:01:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:01:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-04-06 15:01:21,669 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 37 [2022-04-06 15:01:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:21,669 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-04-06 15:01:21,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-04-06 15:01:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 15:01:21,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:21,670 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:21,686 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 15:01:21,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:21,889 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:21,890 INFO L85 PathProgramCache]: Analyzing trace with hash -437658803, now seen corresponding path program 2 times [2022-04-06 15:01:21,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:21,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1474221538] [2022-04-06 15:01:21,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:21,916 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2125275948, now seen corresponding path program 1 times [2022-04-06 15:01:21,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:21,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357670539] [2022-04-06 15:01:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:21,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:21,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:21,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308528512] [2022-04-06 15:01:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:21,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:21,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:21,923 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 15:01:21,930 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 15:01:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:21,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 15:01:21,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:22,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:22,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:22,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357670539] [2022-04-06 15:01:22,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:22,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308528512] [2022-04-06 15:01:22,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308528512] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:22,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:22,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 15:01:22,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:22,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1474221538] [2022-04-06 15:01:22,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1474221538] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:22,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:22,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 15:01:22,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847098521] [2022-04-06 15:01:22,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:22,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 15:01:22,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:22,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 15:01:22,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:01:22,090 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:01:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:22,121 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-04-06 15:01:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 15:01:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-04-06 15:01:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:22,122 INFO L225 Difference]: With dead ends: 80 [2022-04-06 15:01:22,122 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 15:01:22,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:01:22,123 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:22,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:01:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 15:01:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-04-06 15:01:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:01:22,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-06 15:01:22,140 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 38 [2022-04-06 15:01:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:22,141 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-06 15:01:22,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:01:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-06 15:01:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 15:01:22,141 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:22,141 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:22,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 15:01:22,347 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,SelfDestructingSolverStorable9 [2022-04-06 15:01:22,348 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:22,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1488699212, now seen corresponding path program 3 times [2022-04-06 15:01:22,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:22,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346057161] [2022-04-06 15:01:22,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:22,375 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:22,375 INFO L85 PathProgramCache]: Analyzing trace with hash 633396971, now seen corresponding path program 1 times [2022-04-06 15:01:22,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:22,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165031463] [2022-04-06 15:01:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:22,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:22,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:22,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217886336] [2022-04-06 15:01:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:22,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:22,396 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 15:01:22,396 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 15:01:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 15:01:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:22,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:22,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:22,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165031463] [2022-04-06 15:01:22,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:22,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217886336] [2022-04-06 15:01:22,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217886336] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:22,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:22,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-04-06 15:01:22,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:22,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346057161] [2022-04-06 15:01:22,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346057161] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:22,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:22,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:01:22,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243163238] [2022-04-06 15:01:22,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:22,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 15:01:22,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:22,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 15:01:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:01:22,873 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:22,961 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-04-06 15:01:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:01:22,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-04-06 15:01:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:22,962 INFO L225 Difference]: With dead ends: 82 [2022-04-06 15:01:22,962 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 15:01:22,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-04-06 15:01:22,963 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:22,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 293 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-04-06 15:01:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 15:01:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-04-06 15:01:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 15:01:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-04-06 15:01:22,976 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 38 [2022-04-06 15:01:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:22,976 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-04-06 15:01:22,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-04-06 15:01:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 15:01:22,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:22,977 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:22,996 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 15:01:23,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:23,190 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1229776654, now seen corresponding path program 4 times [2022-04-06 15:01:23,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:23,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [289643094] [2022-04-06 15:01:23,215 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:23,215 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1251204717, now seen corresponding path program 1 times [2022-04-06 15:01:23,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:23,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406131381] [2022-04-06 15:01:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:23,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:23,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:23,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311842819] [2022-04-06 15:01:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:23,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:23,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:23,224 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 15:01:23,239 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 15:01:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:23,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 15:01:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:30,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:30,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:30,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406131381] [2022-04-06 15:01:30,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:30,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311842819] [2022-04-06 15:01:30,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311842819] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:30,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:30,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-04-06 15:01:31,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [289643094] [2022-04-06 15:01:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [289643094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:31,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:31,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 15:01:31,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026241885] [2022-04-06 15:01:31,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:31,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 15:01:31,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:31,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 15:01:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-04-06 15:01:31,231 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 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 15:01:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:31,324 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2022-04-06 15:01:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 15:01:31,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2022-04-06 15:01:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:31,326 INFO L225 Difference]: With dead ends: 94 [2022-04-06 15:01:31,326 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 15:01:31,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-04-06 15:01:31,326 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:31,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 349 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 91 Unchecked, 0.0s Time] [2022-04-06 15:01:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 15:01:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2022-04-06 15:01:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 67 states have internal predecessors, (76), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 15:01:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2022-04-06 15:01:31,338 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 38 [2022-04-06 15:01:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:31,338 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2022-04-06 15:01:31,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 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 15:01:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2022-04-06 15:01:31,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 15:01:31,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:31,339 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:31,359 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 15:01:31,547 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,SelfDestructingSolverStorable11 [2022-04-06 15:01:31,547 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:31,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:31,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1473231215, now seen corresponding path program 5 times [2022-04-06 15:01:31,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:31,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222766382] [2022-04-06 15:01:31,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:31,569 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:31,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1923577714, now seen corresponding path program 1 times [2022-04-06 15:01:31,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:31,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951569616] [2022-04-06 15:01:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:31,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:31,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:31,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121581328] [2022-04-06 15:01:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:31,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:31,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:31,579 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 15:01:31,580 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 15:01:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 15:01:31,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:31,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:31,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:31,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951569616] [2022-04-06 15:01:31,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:31,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121581328] [2022-04-06 15:01:31,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121581328] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:31,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:31,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-04-06 15:01:32,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:32,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222766382] [2022-04-06 15:01:32,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222766382] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:32,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:32,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:01:32,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988482240] [2022-04-06 15:01:32,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:32,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 15:01:32,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:32,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 15:01:32,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:01:32,047 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:32,173 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2022-04-06 15:01:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 15:01:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-04-06 15:01:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:32,174 INFO L225 Difference]: With dead ends: 94 [2022-04-06 15:01:32,174 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 15:01:32,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:01:32,176 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:32,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 377 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-04-06 15:01:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 15:01:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-04-06 15:01:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 68 states have internal predecessors, (77), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-06 15:01:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2022-04-06 15:01:32,190 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 38 [2022-04-06 15:01:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:32,190 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2022-04-06 15:01:32,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2022-04-06 15:01:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 15:01:32,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:32,191 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:32,207 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 15:01:32,407 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,SelfDestructingSolverStorable12 [2022-04-06 15:01:32,407 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:32,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1109766783, now seen corresponding path program 6 times [2022-04-06 15:01:32,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:32,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1885708903] [2022-04-06 15:01:32,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:32,430 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:32,431 INFO L85 PathProgramCache]: Analyzing trace with hash 296740736, now seen corresponding path program 1 times [2022-04-06 15:01:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:32,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819089423] [2022-04-06 15:01:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:32,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:32,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854375084] [2022-04-06 15:01:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:32,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:32,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:32,452 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 15:01:32,468 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 15:01:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:32,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 15:01:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:01:34,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:01:35,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:35,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819089423] [2022-04-06 15:01:35,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:35,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854375084] [2022-04-06 15:01:35,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854375084] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:35,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:35,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2022-04-06 15:01:35,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:35,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1885708903] [2022-04-06 15:01:35,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1885708903] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:35,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:35,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 15:01:35,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483058053] [2022-04-06 15:01:35,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:35,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 15:01:35,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 15:01:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-04-06 15:01:35,781 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 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 15:01:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:35,827 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-04-06 15:01:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 15:01:35,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-04-06 15:01:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:35,829 INFO L225 Difference]: With dead ends: 86 [2022-04-06 15:01:35,829 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 15:01:35,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-04-06 15:01:35,832 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:35,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 322 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 57 Unchecked, 0.0s Time] [2022-04-06 15:01:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 15:01:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-04-06 15:01:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 15:01:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-04-06 15:01:35,856 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 39 [2022-04-06 15:01:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:35,856 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-04-06 15:01:35,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (5), 2 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 15:01:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-04-06 15:01:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 15:01:35,856 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:35,856 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:35,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 15:01:36,057 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,SelfDestructingSolverStorable13 [2022-04-06 15:01:36,057 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:36,057 INFO L85 PathProgramCache]: Analyzing trace with hash -553670662, now seen corresponding path program 7 times [2022-04-06 15:01:36,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:36,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1404980670] [2022-04-06 15:01:36,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:36,082 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:36,082 INFO L85 PathProgramCache]: Analyzing trace with hash 42138939, now seen corresponding path program 1 times [2022-04-06 15:01:36,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:36,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593723125] [2022-04-06 15:01:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:36,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:36,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:36,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272308546] [2022-04-06 15:01:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:36,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:36,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:36,119 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 15:01:36,120 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 15:01:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 15:01:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:01:36,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:01:36,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:36,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593723125] [2022-04-06 15:01:36,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:36,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272308546] [2022-04-06 15:01:36,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272308546] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:36,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:36,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-06 15:01:36,301 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:36,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1404980670] [2022-04-06 15:01:36,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1404980670] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:36,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:36,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:01:36,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655100147] [2022-04-06 15:01:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:36,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:01:36,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:01:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:01:36,302 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:01:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:36,344 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-04-06 15:01:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:01:36,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-04-06 15:01:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:36,345 INFO L225 Difference]: With dead ends: 85 [2022-04-06 15:01:36,345 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 15:01:36,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:01:36,346 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:36,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 134 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:01:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 15:01:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-06 15:01:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 62 states have internal predecessors, (71), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 15:01:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-04-06 15:01:36,384 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 39 [2022-04-06 15:01:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:36,384 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-04-06 15:01:36,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:01:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-04-06 15:01:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 15:01:36,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:36,385 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:36,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 15:01:36,585 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,SelfDestructingSolverStorable14 [2022-04-06 15:01:36,586 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:36,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1701022282, now seen corresponding path program 8 times [2022-04-06 15:01:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:36,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1964239170] [2022-04-06 15:01:36,618 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:36,619 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash -589299765, now seen corresponding path program 1 times [2022-04-06 15:01:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:36,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450804158] [2022-04-06 15:01:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:36,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:36,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316064635] [2022-04-06 15:01:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:36,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:36,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:36,636 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 15:01:36,638 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 15:01:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:36,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 15:01:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:36,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:37,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:37,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450804158] [2022-04-06 15:01:37,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:37,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316064635] [2022-04-06 15:01:37,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316064635] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:37,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:37,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-04-06 15:01:37,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:37,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1964239170] [2022-04-06 15:01:37,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1964239170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:37,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:37,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 15:01:37,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846103971] [2022-04-06 15:01:37,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:37,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 15:01:37,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 15:01:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2022-04-06 15:01:37,055 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:37,269 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2022-04-06 15:01:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 15:01:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-06 15:01:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:37,270 INFO L225 Difference]: With dead ends: 109 [2022-04-06 15:01:37,270 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 15:01:37,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-04-06 15:01:37,271 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:37,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 694 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:01:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 15:01:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2022-04-06 15:01:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 77 states have internal predecessors, (87), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-04-06 15:01:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-04-06 15:01:37,287 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 39 [2022-04-06 15:01:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:37,287 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-04-06 15:01:37,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-04-06 15:01:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 15:01:37,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:37,288 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:37,307 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 15:01:37,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:37,505 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1365215520, now seen corresponding path program 9 times [2022-04-06 15:01:37,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:37,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [776599089] [2022-04-06 15:01:37,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:37,548 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:37,548 INFO L85 PathProgramCache]: Analyzing trace with hash -191059073, now seen corresponding path program 1 times [2022-04-06 15:01:37,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:37,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540513071] [2022-04-06 15:01:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:37,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:37,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:37,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395451944] [2022-04-06 15:01:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:37,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:37,564 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 15:01:37,566 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 15:01:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:37,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 15:01:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:37,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:37,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:37,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540513071] [2022-04-06 15:01:37,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:37,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395451944] [2022-04-06 15:01:37,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395451944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:37,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:37,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 26 [2022-04-06 15:01:37,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:37,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [776599089] [2022-04-06 15:01:37,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [776599089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:37,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:37,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 15:01:37,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116745973] [2022-04-06 15:01:37,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:37,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 15:01:37,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 15:01:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-04-06 15:01:37,998 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:38,217 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2022-04-06 15:01:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 15:01:38,217 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-06 15:01:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:38,218 INFO L225 Difference]: With dead ends: 107 [2022-04-06 15:01:38,218 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 15:01:38,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-04-06 15:01:38,219 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:38,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 534 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:01:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 15:01:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-04-06 15:01:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 86 states have internal predecessors, (96), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-04-06 15:01:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2022-04-06 15:01:38,240 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 40 [2022-04-06 15:01:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:38,240 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2022-04-06 15:01:38,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2022-04-06 15:01:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 15:01:38,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:38,241 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:38,258 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 15:01:38,447 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,SelfDestructingSolverStorable16 [2022-04-06 15:01:38,447 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:38,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:38,448 INFO L85 PathProgramCache]: Analyzing trace with hash 172610767, now seen corresponding path program 10 times [2022-04-06 15:01:38,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:38,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [716048764] [2022-04-06 15:01:38,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:38,478 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:38,479 INFO L85 PathProgramCache]: Analyzing trace with hash -659431698, now seen corresponding path program 1 times [2022-04-06 15:01:38,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:38,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454574328] [2022-04-06 15:01:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:38,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:38,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631852711] [2022-04-06 15:01:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:38,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:38,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:38,484 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 15:01:38,485 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 15:01:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 15:01:38,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:38,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:39,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:39,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454574328] [2022-04-06 15:01:39,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:39,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631852711] [2022-04-06 15:01:39,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631852711] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:39,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:39,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-04-06 15:01:39,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:39,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [716048764] [2022-04-06 15:01:39,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [716048764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:39,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:39,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 15:01:39,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859968978] [2022-04-06 15:01:39,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:39,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 15:01:39,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 15:01:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-04-06 15:01:39,216 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:39,446 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2022-04-06 15:01:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 15:01:39,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-06 15:01:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:39,447 INFO L225 Difference]: With dead ends: 121 [2022-04-06 15:01:39,447 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 15:01:39,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-04-06 15:01:39,448 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:39,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 462 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-04-06 15:01:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 15:01:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2022-04-06 15:01:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.2375) internal successors, (99), 88 states have internal predecessors, (99), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-04-06 15:01:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-04-06 15:01:39,469 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 40 [2022-04-06 15:01:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:39,469 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-04-06 15:01:39,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-04-06 15:01:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 15:01:39,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:39,470 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:39,488 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 15:01:39,675 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,SelfDestructingSolverStorable17 [2022-04-06 15:01:39,675 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:39,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:39,676 INFO L85 PathProgramCache]: Analyzing trace with hash -306897140, now seen corresponding path program 11 times [2022-04-06 15:01:39,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:39,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356849072] [2022-04-06 15:01:39,698 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:39,698 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash -414707477, now seen corresponding path program 1 times [2022-04-06 15:01:39,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:39,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235537804] [2022-04-06 15:01:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:39,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:39,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:39,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851830432] [2022-04-06 15:01:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:39,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:39,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:39,704 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 15:01:39,722 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 15:01:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 15:01:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:39,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:01:40,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235537804] [2022-04-06 15:01:40,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851830432] [2022-04-06 15:01:40,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851830432] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:40,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:40,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-04-06 15:01:40,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:40,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356849072] [2022-04-06 15:01:40,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356849072] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:40,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:40,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 15:01:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054441754] [2022-04-06 15:01:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:40,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 15:01:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 15:01:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-04-06 15:01:40,407 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:40,604 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2022-04-06 15:01:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:01:40,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-04-06 15:01:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:40,605 INFO L225 Difference]: With dead ends: 116 [2022-04-06 15:01:40,605 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 15:01:40,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-04-06 15:01:40,606 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 28 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:40,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 512 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-04-06 15:01:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 15:01:40,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2022-04-06 15:01:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 89 states have internal predecessors, (100), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-04-06 15:01:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2022-04-06 15:01:40,625 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 40 [2022-04-06 15:01:40,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:40,625 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2022-04-06 15:01:40,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2022-04-06 15:01:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 15:01:40,625 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:40,625 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:40,643 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 15:01:40,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:40,844 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash 721145018, now seen corresponding path program 12 times [2022-04-06 15:01:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:40,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1628486803] [2022-04-06 15:01:40,873 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:40,873 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:40,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1644615941, now seen corresponding path program 1 times [2022-04-06 15:01:40,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:40,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690818246] [2022-04-06 15:01:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:40,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:40,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:40,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984304560] [2022-04-06 15:01:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:40,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:40,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:40,878 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 15:01:40,886 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 15:01:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:40,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:01:40,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:01:41,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:01:41,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:41,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690818246] [2022-04-06 15:01:41,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:41,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984304560] [2022-04-06 15:01:41,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984304560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:41,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:41,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-06 15:01:41,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:41,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1628486803] [2022-04-06 15:01:41,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1628486803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:41,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:41,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:01:41,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637489745] [2022-04-06 15:01:41,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:41,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:01:41,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:01:41,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-06 15:01:41,081 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:01:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:41,137 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2022-04-06 15:01:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:01:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-04-06 15:01:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:41,141 INFO L225 Difference]: With dead ends: 146 [2022-04-06 15:01:41,141 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 15:01:41,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-04-06 15:01:41,142 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:41,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:01:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 15:01:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2022-04-06 15:01:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 106 states have internal predecessors, (121), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-04-06 15:01:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2022-04-06 15:01:41,164 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 41 [2022-04-06 15:01:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:41,164 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2022-04-06 15:01:41,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:01:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2022-04-06 15:01:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 15:01:41,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:41,165 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:41,181 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 15:01:41,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:41,366 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash 694191775, now seen corresponding path program 13 times [2022-04-06 15:01:41,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:41,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765148266] [2022-04-06 15:01:41,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:41,398 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash -695209696, now seen corresponding path program 1 times [2022-04-06 15:01:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407426124] [2022-04-06 15:01:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:41,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:41,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913835579] [2022-04-06 15:01:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:41,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:41,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:41,415 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 15:01:41,416 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 15:01:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:41,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 15:01:41,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:01:47,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:01:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407426124] [2022-04-06 15:01:49,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913835579] [2022-04-06 15:01:49,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913835579] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:49,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:49,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2022-04-06 15:01:49,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:49,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [765148266] [2022-04-06 15:01:49,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [765148266] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:49,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:49,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 15:01:49,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274623087] [2022-04-06 15:01:49,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:49,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 15:01:49,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:49,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 15:01:49,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=747, Unknown=1, NotChecked=0, Total=870 [2022-04-06 15:01:49,486 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 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 15:01:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:49,578 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2022-04-06 15:01:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 15:01:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2022-04-06 15:01:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:49,580 INFO L225 Difference]: With dead ends: 148 [2022-04-06 15:01:49,580 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 15:01:49,580 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=129, Invalid=800, Unknown=1, NotChecked=0, Total=930 [2022-04-06 15:01:49,581 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 24 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:49,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 444 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 108 Unchecked, 0.0s Time] [2022-04-06 15:01:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 15:01:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-04-06 15:01:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 118 states have internal predecessors, (130), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-04-06 15:01:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2022-04-06 15:01:49,607 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 41 [2022-04-06 15:01:49,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:49,607 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2022-04-06 15:01:49,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 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 15:01:49,608 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2022-04-06 15:01:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 15:01:49,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:49,609 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:49,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 15:01:49,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:49,823 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1943349171, now seen corresponding path program 14 times [2022-04-06 15:01:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:49,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2095212260] [2022-04-06 15:01:49,849 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:49,849 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:49,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1938576142, now seen corresponding path program 1 times [2022-04-06 15:01:49,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:49,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710551607] [2022-04-06 15:01:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:49,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:49,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:49,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425500179] [2022-04-06 15:01:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:49,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:49,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:49,858 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 15:01:49,858 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 15:01:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:49,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 15:01:49,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:50,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:50,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:50,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710551607] [2022-04-06 15:01:50,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:01:50,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425500179] [2022-04-06 15:01:50,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425500179] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:50,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:01:50,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 26 [2022-04-06 15:01:50,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2095212260] [2022-04-06 15:01:50,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2095212260] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:50,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:50,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 15:01:50,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891966150] [2022-04-06 15:01:50,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:50,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 15:01:50,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:50,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 15:01:50,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2022-04-06 15:01:50,358 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:50,641 INFO L93 Difference]: Finished difference Result 181 states and 217 transitions. [2022-04-06 15:01:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 15:01:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-04-06 15:01:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:50,643 INFO L225 Difference]: With dead ends: 181 [2022-04-06 15:01:50,643 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 15:01:50,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-04-06 15:01:50,646 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 48 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:50,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 995 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:01:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 15:01:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 149. [2022-04-06 15:01:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 119 states have (on average 1.226890756302521) internal successors, (146), 133 states have internal predecessors, (146), 12 states have call successors, (12), 5 states have call predecessors, (12), 17 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2022-04-06 15:01:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 179 transitions. [2022-04-06 15:01:50,690 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 179 transitions. Word has length 41 [2022-04-06 15:01:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:50,690 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 179 transitions. [2022-04-06 15:01:50,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:01:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 179 transitions. [2022-04-06 15:01:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 15:01:50,692 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:50,692 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:50,712 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 15:01:50,905 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,SelfDestructingSolverStorable21 [2022-04-06 15:01:50,905 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1212394418, now seen corresponding path program 15 times [2022-04-06 15:01:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:50,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1559971263] [2022-04-06 15:01:50,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:01:50,957 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash -929420947, now seen corresponding path program 1 times [2022-04-06 15:01:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:50,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698188895] [2022-04-06 15:01:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:50,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:50,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:01:50,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714762952] [2022-04-06 15:01:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:50,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:50,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:50,977 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 15:01:50,978 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 15:01:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:51,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 15:01:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:02:03,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:02:06,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:06,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698188895] [2022-04-06 15:02:06,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:02:06,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714762952] [2022-04-06 15:02:06,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714762952] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:06,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:02:06,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-04-06 15:02:12,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:12,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1559971263] [2022-04-06 15:02:12,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1559971263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:12,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:12,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 15:02:12,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943894606] [2022-04-06 15:02:12,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:12,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 15:02:12,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:12,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 15:02:12,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-04-06 15:02:12,084 INFO L87 Difference]: Start difference. First operand 149 states and 179 transitions. Second operand has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 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 15:02:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:12,397 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2022-04-06 15:02:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 15:02:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-04-06 15:02:12,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:12,399 INFO L225 Difference]: With dead ends: 155 [2022-04-06 15:02:12,399 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 15:02:12,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-04-06 15:02:12,400 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:12,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 426 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-04-06 15:02:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 15:02:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-04-06 15:02:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 113 states have (on average 1.2212389380530972) internal successors, (138), 125 states have internal predecessors, (138), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-04-06 15:02:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2022-04-06 15:02:12,433 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 42 [2022-04-06 15:02:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:12,433 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2022-04-06 15:02:12,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.0) internal successors, (32), 18 states have internal predecessors, (32), 4 states have call successors, (5), 2 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 15:02:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2022-04-06 15:02:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 15:02:12,434 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:12,434 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:12,450 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 15:02:12,638 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,SelfDestructingSolverStorable22 [2022-04-06 15:02:12,638 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:12,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1837396333, now seen corresponding path program 16 times [2022-04-06 15:02:12,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:12,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1158853139] [2022-04-06 15:02:12,723 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:02:12,723 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1972224436, now seen corresponding path program 1 times [2022-04-06 15:02:12,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:12,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021524142] [2022-04-06 15:02:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:12,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:12,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:02:12,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842003262] [2022-04-06 15:02:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:12,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:12,729 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 15:02:12,730 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 15:02:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:12,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 15:02:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:02:13,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:02:13,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:13,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021524142] [2022-04-06 15:02:13,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:02:13,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842003262] [2022-04-06 15:02:13,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842003262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:13,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:02:13,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-04-06 15:02:13,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:13,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1158853139] [2022-04-06 15:02:13,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1158853139] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:13,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:13,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 15:02:13,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729397997] [2022-04-06 15:02:13,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:13,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 15:02:13,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:13,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 15:02:13,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:02:13,450 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:02:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:13,654 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2022-04-06 15:02:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 15:02:13,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-04-06 15:02:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:13,656 INFO L225 Difference]: With dead ends: 158 [2022-04-06 15:02:13,656 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 15:02:13,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:02:13,657 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:13,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 151 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:02:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 15:02:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-04-06 15:02:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 128 states have internal predecessors, (141), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-04-06 15:02:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2022-04-06 15:02:13,702 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 42 [2022-04-06 15:02:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:13,703 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2022-04-06 15:02:13,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:02:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2022-04-06 15:02:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 15:02:13,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:13,706 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:13,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 15:02:13,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:13,915 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:13,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:13,916 INFO L85 PathProgramCache]: Analyzing trace with hash -861547299, now seen corresponding path program 17 times [2022-04-06 15:02:13,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:13,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1375169673] [2022-04-06 15:02:14,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:02:14,009 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash -173827716, now seen corresponding path program 1 times [2022-04-06 15:02:14,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:14,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006191197] [2022-04-06 15:02:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:14,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:14,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:02:14,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728779455] [2022-04-06 15:02:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:14,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:14,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:14,014 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 15:02:14,015 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 15:02:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 15:02:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:02:15,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:02:17,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:17,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006191197] [2022-04-06 15:02:17,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:02:17,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728779455] [2022-04-06 15:02:17,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728779455] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:17,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:02:17,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2022-04-06 15:02:17,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:17,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1375169673] [2022-04-06 15:02:17,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1375169673] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:17,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:17,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 15:02:17,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461868543] [2022-04-06 15:02:17,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:17,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 15:02:17,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:17,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 15:02:17,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2022-04-06 15:02:17,247 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:19,037 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2022-04-06 15:02:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 15:02:19,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 15:02:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:19,039 INFO L225 Difference]: With dead ends: 149 [2022-04-06 15:02:19,039 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 15:02:19,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 15:02:19,040 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 35 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:19,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 763 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 15:02:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 15:02:19,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-04-06 15:02:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 117 states have internal predecessors, (130), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-04-06 15:02:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2022-04-06 15:02:19,071 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 42 [2022-04-06 15:02:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:19,078 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2022-04-06 15:02:19,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2022-04-06 15:02:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 15:02:19,079 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:19,079 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:19,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 15:02:19,286 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:19,287 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:19,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:19,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1133754580, now seen corresponding path program 18 times [2022-04-06 15:02:19,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:19,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [706342355] [2022-04-06 15:02:19,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:02:19,386 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:19,386 INFO L85 PathProgramCache]: Analyzing trace with hash -243661941, now seen corresponding path program 1 times [2022-04-06 15:02:19,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:19,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698590600] [2022-04-06 15:02:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:19,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:19,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:02:19,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414803413] [2022-04-06 15:02:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:19,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:19,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:19,398 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 15:02:19,399 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 15:02:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 15:02:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:02:20,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:02:22,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:22,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698590600] [2022-04-06 15:02:22,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:02:22,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414803413] [2022-04-06 15:02:22,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414803413] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:22,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:02:22,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 15:02:23,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:23,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [706342355] [2022-04-06 15:02:23,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [706342355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:23,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:23,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 15:02:23,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341791287] [2022-04-06 15:02:23,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:23,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 15:02:23,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:23,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 15:02:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-04-06 15:02:23,785 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:25,475 INFO L93 Difference]: Finished difference Result 168 states and 199 transitions. [2022-04-06 15:02:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 15:02:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 15:02:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:25,477 INFO L225 Difference]: With dead ends: 168 [2022-04-06 15:02:25,477 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 15:02:25,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-04-06 15:02:25,478 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 55 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:25,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 564 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 249 Invalid, 0 Unknown, 26 Unchecked, 0.9s Time] [2022-04-06 15:02:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 15:02:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2022-04-06 15:02:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 133 states have internal predecessors, (147), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2022-04-06 15:02:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 175 transitions. [2022-04-06 15:02:25,515 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 175 transitions. Word has length 42 [2022-04-06 15:02:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:25,515 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 175 transitions. [2022-04-06 15:02:25,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 175 transitions. [2022-04-06 15:02:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 15:02:25,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:25,516 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:25,532 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 15:02:25,722 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,SelfDestructingSolverStorable25 [2022-04-06 15:02:25,723 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1181369487, now seen corresponding path program 19 times [2022-04-06 15:02:25,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:25,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1994816778] [2022-04-06 15:02:25,808 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:02:25,808 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:25,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2021132114, now seen corresponding path program 1 times [2022-04-06 15:02:25,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:25,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095749198] [2022-04-06 15:02:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:25,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:25,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:02:25,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082440515] [2022-04-06 15:02:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:25,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:25,814 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 15:02:25,814 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 15:02:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 15:02:25,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:02:27,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:02:29,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:29,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095749198] [2022-04-06 15:02:29,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:02:29,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082440515] [2022-04-06 15:02:29,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082440515] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:29,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:02:29,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 15:02:30,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:30,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1994816778] [2022-04-06 15:02:30,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1994816778] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:30,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:30,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 15:02:30,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036794072] [2022-04-06 15:02:30,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:30,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 15:02:30,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:30,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 15:02:30,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-04-06 15:02:30,255 INFO L87 Difference]: Start difference. First operand 148 states and 175 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:31,782 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2022-04-06 15:02:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 15:02:31,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 15:02:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:31,785 INFO L225 Difference]: With dead ends: 163 [2022-04-06 15:02:31,785 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 15:02:31,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-04-06 15:02:31,786 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 40 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:31,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 851 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 382 Invalid, 0 Unknown, 63 Unchecked, 1.4s Time] [2022-04-06 15:02:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 15:02:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-04-06 15:02:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 134 states have internal predecessors, (148), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-04-06 15:02:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2022-04-06 15:02:31,824 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 42 [2022-04-06 15:02:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:31,824 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2022-04-06 15:02:31,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2022-04-06 15:02:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 15:02:31,825 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:31,825 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:31,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 15:02:32,043 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,SelfDestructingSolverStorable26 [2022-04-06 15:02:32,043 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1821118963, now seen corresponding path program 20 times [2022-04-06 15:02:32,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:32,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1295508679] [2022-04-06 15:02:32,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:02:32,125 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash -335823346, now seen corresponding path program 1 times [2022-04-06 15:02:32,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:32,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808384664] [2022-04-06 15:02:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:32,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:32,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:02:32,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9516856] [2022-04-06 15:02:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:32,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:32,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:32,131 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 15:02:32,132 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 15:02:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 15:02:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:02:33,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:02:35,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:35,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808384664] [2022-04-06 15:02:35,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:02:35,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9516856] [2022-04-06 15:02:35,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9516856] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:35,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:02:35,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 30 [2022-04-06 15:02:35,565 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:35,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1295508679] [2022-04-06 15:02:35,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1295508679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:35,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:35,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 15:02:35,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592361533] [2022-04-06 15:02:35,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:35,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 15:02:35,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 15:02:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-04-06 15:02:35,571 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:37,304 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2022-04-06 15:02:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 15:02:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 15:02:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:37,305 INFO L225 Difference]: With dead ends: 167 [2022-04-06 15:02:37,305 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 15:02:37,306 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 15:02:37,306 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:37,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 542 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 15:02:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 15:02:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-04-06 15:02:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 129 states have (on average 1.2170542635658914) internal successors, (157), 143 states have internal predecessors, (157), 12 states have call successors, (12), 5 states have call predecessors, (12), 17 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-04-06 15:02:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2022-04-06 15:02:37,347 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 43 [2022-04-06 15:02:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:37,347 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2022-04-06 15:02:37,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2022-04-06 15:02:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 15:02:37,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:37,348 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:37,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 15:02:37,563 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,SelfDestructingSolverStorable27 [2022-04-06 15:02:37,563 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:37,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1243243306, now seen corresponding path program 21 times [2022-04-06 15:02:37,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:37,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1677134023] [2022-04-06 15:02:37,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:02:37,662 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:37,663 INFO L85 PathProgramCache]: Analyzing trace with hash 412169067, now seen corresponding path program 1 times [2022-04-06 15:02:37,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:37,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677910922] [2022-04-06 15:02:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:37,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:37,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:02:37,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500257324] [2022-04-06 15:02:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:37,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:37,668 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 15:02:37,670 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 15:02:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 15:02:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:39,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677910922] [2022-04-06 15:02:40,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:02:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500257324] [2022-04-06 15:02:40,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500257324] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:40,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:02:40,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 28 [2022-04-06 15:02:41,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:41,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1677134023] [2022-04-06 15:02:41,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1677134023] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:41,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:41,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 15:02:41,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655438235] [2022-04-06 15:02:41,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:41,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 15:02:41,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:41,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 15:02:41,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2022-04-06 15:02:41,131 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:43,610 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2022-04-06 15:02:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 15:02:43,611 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 15:02:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:43,612 INFO L225 Difference]: With dead ends: 208 [2022-04-06 15:02:43,612 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 15:02:43,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 15:02:43,613 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 60 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:43,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1464 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 15:02:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 15:02:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 175. [2022-04-06 15:02:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 158 states have internal predecessors, (173), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-04-06 15:02:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2022-04-06 15:02:43,659 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 43 [2022-04-06 15:02:43,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:43,660 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2022-04-06 15:02:43,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2022-04-06 15:02:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 15:02:43,661 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:43,661 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:43,676 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 15:02:43,876 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,SelfDestructingSolverStorable28 [2022-04-06 15:02:43,876 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:43,877 INFO L85 PathProgramCache]: Analyzing trace with hash 729023853, now seen corresponding path program 22 times [2022-04-06 15:02:43,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:43,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [387661675] [2022-04-06 15:02:43,957 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:02:43,957 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:43,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1942504716, now seen corresponding path program 1 times [2022-04-06 15:02:43,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:43,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953417693] [2022-04-06 15:02:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:43,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:43,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:02:43,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064025617] [2022-04-06 15:02:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:43,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:43,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:43,962 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 15:02:43,974 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 15:02:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:44,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:02:44,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:02:44,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:02:44,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:44,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953417693] [2022-04-06 15:02:44,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:02:44,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064025617] [2022-04-06 15:02:44,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064025617] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:44,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:02:44,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-06 15:02:44,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [387661675] [2022-04-06 15:02:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [387661675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:44,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:44,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:02:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702291572] [2022-04-06 15:02:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:44,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 15:02:44,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 15:02:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:02:44,809 INFO L87 Difference]: Start difference. First operand 175 states and 207 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:02:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:45,391 INFO L93 Difference]: Finished difference Result 235 states and 280 transitions. [2022-04-06 15:02:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 15:02:45,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-04-06 15:02:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:45,393 INFO L225 Difference]: With dead ends: 235 [2022-04-06 15:02:45,393 INFO L226 Difference]: Without dead ends: 213 [2022-04-06 15:02:45,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-04-06 15:02:45,395 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 49 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:45,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 233 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:02:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-06 15:02:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 201. [2022-04-06 15:02:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 168 states have (on average 1.2142857142857142) internal successors, (204), 184 states have internal predecessors, (204), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2022-04-06 15:02:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2022-04-06 15:02:45,446 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 44 [2022-04-06 15:02:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:45,446 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2022-04-06 15:02:45,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:02:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2022-04-06 15:02:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 15:02:45,447 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:45,447 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:45,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 15:02:45,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:45,652 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:45,652 INFO L85 PathProgramCache]: Analyzing trace with hash 783256622, now seen corresponding path program 23 times [2022-04-06 15:02:45,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:45,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051105833] [2022-04-06 15:02:45,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:02:45,762 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1091251315, now seen corresponding path program 1 times [2022-04-06 15:02:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:45,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493548467] [2022-04-06 15:02:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:45,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:02:45,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292467379] [2022-04-06 15:02:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:45,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:45,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:45,768 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 15:02:45,781 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 15:02:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:46,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 15:02:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:03:03,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:03:11,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493548467] [2022-04-06 15:03:11,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:03:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292467379] [2022-04-06 15:03:11,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292467379] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:11,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:03:11,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2022-04-06 15:03:15,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:15,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051105833] [2022-04-06 15:03:15,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051105833] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:15,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:15,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 15:03:15,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625431129] [2022-04-06 15:03:15,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:15,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 15:03:15,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 15:03:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=967, Unknown=1, NotChecked=0, Total=1122 [2022-04-06 15:03:15,272 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 4 states have call successors, (5), 2 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 15:03:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:16,044 INFO L93 Difference]: Finished difference Result 239 states and 284 transitions. [2022-04-06 15:03:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 15:03:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2022-04-06 15:03:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:16,046 INFO L225 Difference]: With dead ends: 239 [2022-04-06 15:03:16,046 INFO L226 Difference]: Without dead ends: 225 [2022-04-06 15:03:16,048 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=177, Invalid=1082, Unknown=1, NotChecked=0, Total=1260 [2022-04-06 15:03:16,048 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 29 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:16,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 522 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-04-06 15:03:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-04-06 15:03:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2022-04-06 15:03:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 203 states have internal predecessors, (219), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2022-04-06 15:03:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 265 transitions. [2022-04-06 15:03:16,118 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 265 transitions. Word has length 44 [2022-04-06 15:03:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:16,118 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 265 transitions. [2022-04-06 15:03:16,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 4 states have call successors, (5), 2 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 15:03:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 265 transitions. [2022-04-06 15:03:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 15:03:16,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:16,120 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:16,141 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 15:03:16,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:16,339 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:16,340 INFO L85 PathProgramCache]: Analyzing trace with hash 671021120, now seen corresponding path program 24 times [2022-04-06 15:03:16,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:16,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1605680348] [2022-04-06 15:03:16,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:03:16,434 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash 3491679, now seen corresponding path program 1 times [2022-04-06 15:03:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:16,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764028486] [2022-04-06 15:03:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:16,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:16,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:03:16,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750753858] [2022-04-06 15:03:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:16,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:16,440 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 15:03:16,440 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 15:03:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:16,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 15:03:16,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:03:18,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:03:19,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:19,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764028486] [2022-04-06 15:03:19,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:03:19,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750753858] [2022-04-06 15:03:19,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750753858] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:19,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:03:19,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 30 [2022-04-06 15:03:20,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:20,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1605680348] [2022-04-06 15:03:20,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1605680348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:20,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:20,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 15:03:20,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195930803] [2022-04-06 15:03:20,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:20,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 15:03:20,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:20,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 15:03:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2022-04-06 15:03:20,153 INFO L87 Difference]: Start difference. First operand 223 states and 265 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:22,701 INFO L93 Difference]: Finished difference Result 229 states and 270 transitions. [2022-04-06 15:03:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 15:03:22,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-06 15:03:22,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:22,702 INFO L225 Difference]: With dead ends: 229 [2022-04-06 15:03:22,702 INFO L226 Difference]: Without dead ends: 211 [2022-04-06 15:03:22,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 15:03:22,703 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:22,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1313 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 15:03:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-04-06 15:03:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-04-06 15:03:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 192 states have internal predecessors, (208), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2022-04-06 15:03:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 251 transitions. [2022-04-06 15:03:22,761 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 251 transitions. Word has length 44 [2022-04-06 15:03:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:22,761 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 251 transitions. [2022-04-06 15:03:22,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 251 transitions. [2022-04-06 15:03:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 15:03:22,763 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:22,763 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:22,779 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 15:03:22,979 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,SelfDestructingSolverStorable31 [2022-04-06 15:03:22,979 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1133635601, now seen corresponding path program 25 times [2022-04-06 15:03:22,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:22,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [503810766] [2022-04-06 15:03:23,064 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:03:23,065 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash -594186546, now seen corresponding path program 1 times [2022-04-06 15:03:23,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:23,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723206229] [2022-04-06 15:03:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:23,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:23,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:03:23,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484191396] [2022-04-06 15:03:23,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:23,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:23,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:23,070 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 15:03:23,071 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 15:03:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 15:03:23,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:03:24,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:03:27,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723206229] [2022-04-06 15:03:27,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:03:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484191396] [2022-04-06 15:03:27,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484191396] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:27,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:03:27,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-04-06 15:03:28,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:28,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [503810766] [2022-04-06 15:03:28,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [503810766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:28,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:28,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 15:03:28,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798241875] [2022-04-06 15:03:28,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:28,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 15:03:28,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 15:03:28,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-04-06 15:03:28,945 INFO L87 Difference]: Start difference. First operand 211 states and 251 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:31,615 INFO L93 Difference]: Finished difference Result 263 states and 318 transitions. [2022-04-06 15:03:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 15:03:31,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-06 15:03:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:31,621 INFO L225 Difference]: With dead ends: 263 [2022-04-06 15:03:31,621 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 15:03:31,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 15:03:31,623 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 85 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:31,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 816 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 376 Invalid, 0 Unknown, 53 Unchecked, 1.3s Time] [2022-04-06 15:03:31,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 15:03:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 243. [2022-04-06 15:03:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 198 states have (on average 1.207070707070707) internal successors, (239), 222 states have internal predecessors, (239), 17 states have call successors, (17), 5 states have call predecessors, (17), 27 states have return successors, (36), 15 states have call predecessors, (36), 15 states have call successors, (36) [2022-04-06 15:03:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 292 transitions. [2022-04-06 15:03:31,693 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 292 transitions. Word has length 44 [2022-04-06 15:03:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:31,693 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 292 transitions. [2022-04-06 15:03:31,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 292 transitions. [2022-04-06 15:03:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 15:03:31,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:31,695 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:31,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 15:03:31,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:31,899 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1915733740, now seen corresponding path program 26 times [2022-04-06 15:03:31,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:31,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1743997928] [2022-04-06 15:03:32,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:03:32,006 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash -632806005, now seen corresponding path program 1 times [2022-04-06 15:03:32,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:32,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421608106] [2022-04-06 15:03:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:32,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:32,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:03:32,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158158834] [2022-04-06 15:03:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:32,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:32,011 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 15:03:32,012 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 15:03:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:32,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 15:03:32,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:03:33,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:03:36,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:36,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421608106] [2022-04-06 15:03:36,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:03:36,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158158834] [2022-04-06 15:03:36,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158158834] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:36,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:03:36,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-04-06 15:03:38,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:38,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1743997928] [2022-04-06 15:03:38,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1743997928] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:38,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:38,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 15:03:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999918248] [2022-04-06 15:03:38,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:38,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 15:03:38,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 15:03:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-04-06 15:03:38,059 INFO L87 Difference]: Start difference. First operand 243 states and 292 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:40,129 INFO L93 Difference]: Finished difference Result 258 states and 307 transitions. [2022-04-06 15:03:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 15:03:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-04-06 15:03:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:40,133 INFO L225 Difference]: With dead ends: 258 [2022-04-06 15:03:40,133 INFO L226 Difference]: Without dead ends: 246 [2022-04-06 15:03:40,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-04-06 15:03:40,134 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 52 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:40,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 952 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 500 Invalid, 0 Unknown, 1 Unchecked, 1.8s Time] [2022-04-06 15:03:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-04-06 15:03:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-04-06 15:03:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 199 states have (on average 1.2060301507537687) internal successors, (240), 223 states have internal predecessors, (240), 17 states have call successors, (17), 5 states have call predecessors, (17), 27 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2022-04-06 15:03:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 289 transitions. [2022-04-06 15:03:40,208 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 289 transitions. Word has length 44 [2022-04-06 15:03:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:40,208 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 289 transitions. [2022-04-06 15:03:40,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 289 transitions. [2022-04-06 15:03:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 15:03:40,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:40,210 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:40,226 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 15:03:40,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:40,411 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1154646049, now seen corresponding path program 27 times [2022-04-06 15:03:40,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:40,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2038084952] [2022-04-06 15:03:40,504 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:03:40,505 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash 206628192, now seen corresponding path program 1 times [2022-04-06 15:03:40,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521234156] [2022-04-06 15:03:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:40,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:03:40,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336492479] [2022-04-06 15:03:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:40,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:40,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:40,513 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 15:03:40,514 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 15:03:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 15:03:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:03:50,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:04:02,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521234156] [2022-04-06 15:04:02,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:04:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336492479] [2022-04-06 15:04:02,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336492479] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:02,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:04:02,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2022-04-06 15:04:04,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2038084952] [2022-04-06 15:04:04,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2038084952] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:04,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:04,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 15:04:04,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837374405] [2022-04-06 15:04:04,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:04,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 15:04:04,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 15:04:04,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1104, Unknown=2, NotChecked=0, Total=1260 [2022-04-06 15:04:04,971 INFO L87 Difference]: Start difference. First operand 244 states and 289 transitions. Second operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 4 states have call successors, (5), 2 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 15:04:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:05,604 INFO L93 Difference]: Finished difference Result 250 states and 294 transitions. [2022-04-06 15:04:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 15:04:05,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-04-06 15:04:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:05,608 INFO L225 Difference]: With dead ends: 250 [2022-04-06 15:04:05,608 INFO L226 Difference]: Without dead ends: 239 [2022-04-06 15:04:05,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=154, Invalid=1104, Unknown=2, NotChecked=0, Total=1260 [2022-04-06 15:04:05,609 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 28 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:05,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 609 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 106 Unchecked, 0.5s Time] [2022-04-06 15:04:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-04-06 15:04:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2022-04-06 15:04:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 193 states have (on average 1.2020725388601037) internal successors, (232), 215 states have internal predecessors, (232), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2022-04-06 15:04:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 273 transitions. [2022-04-06 15:04:05,688 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 273 transitions. Word has length 45 [2022-04-06 15:04:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:05,688 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 273 transitions. [2022-04-06 15:04:05,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 4 states have call successors, (5), 2 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 15:04:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 273 transitions. [2022-04-06 15:04:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 15:04:05,690 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:05,690 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:05,707 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 15:04:05,903 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,SelfDestructingSolverStorable34 [2022-04-06 15:04:05,903 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 713065306, now seen corresponding path program 28 times [2022-04-06 15:04:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:05,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336466182] [2022-04-06 15:04:06,004 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:04:06,005 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:06,005 INFO L85 PathProgramCache]: Analyzing trace with hash 835967259, now seen corresponding path program 1 times [2022-04-06 15:04:06,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:06,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733138761] [2022-04-06 15:04:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:06,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:06,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:04:06,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290956809] [2022-04-06 15:04:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:06,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:06,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:06,012 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:04:06,021 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 15:04:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:06,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 15:04:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:04:06,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:04:06,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:06,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733138761] [2022-04-06 15:04:06,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:04:06,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290956809] [2022-04-06 15:04:06,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290956809] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:06,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:04:06,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-04-06 15:04:07,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336466182] [2022-04-06 15:04:07,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336466182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:07,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:07,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:04:07,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895279538] [2022-04-06 15:04:07,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:07,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:04:07,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:04:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:04:07,006 INFO L87 Difference]: Start difference. First operand 235 states and 273 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:04:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:07,282 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2022-04-06 15:04:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:04:07,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-04-06 15:04:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:07,285 INFO L225 Difference]: With dead ends: 261 [2022-04-06 15:04:07,285 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 15:04:07,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:04:07,287 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 54 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:07,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 140 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:04:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 15:04:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-04-06 15:04:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 198 states have (on average 1.196969696969697) internal successors, (237), 220 states have internal predecessors, (237), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2022-04-06 15:04:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 278 transitions. [2022-04-06 15:04:07,372 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 278 transitions. Word has length 45 [2022-04-06 15:04:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:07,372 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 278 transitions. [2022-04-06 15:04:07,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:04:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 278 transitions. [2022-04-06 15:04:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 15:04:07,374 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:07,374 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:07,392 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 15:04:07,593 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,SelfDestructingSolverStorable35 [2022-04-06 15:04:07,593 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash 200538666, now seen corresponding path program 29 times [2022-04-06 15:04:07,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:07,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86425510] [2022-04-06 15:04:07,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:04:07,691 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:07,691 INFO L85 PathProgramCache]: Analyzing trace with hash -914931669, now seen corresponding path program 1 times [2022-04-06 15:04:07,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:07,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859487841] [2022-04-06 15:04:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:07,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:07,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:04:07,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405604669] [2022-04-06 15:04:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:07,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:07,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:07,696 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 15:04:07,697 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 15:04:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 15:04:07,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:04:09,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:04:11,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:11,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859487841] [2022-04-06 15:04:11,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:04:11,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405604669] [2022-04-06 15:04:11,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405604669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:11,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:04:11,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 32 [2022-04-06 15:04:11,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:11,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86425510] [2022-04-06 15:04:11,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86425510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:11,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:11,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 15:04:11,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489014506] [2022-04-06 15:04:11,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:11,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 15:04:11,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 15:04:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 15:04:11,839 INFO L87 Difference]: Start difference. First operand 240 states and 278 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:14,062 INFO L93 Difference]: Finished difference Result 246 states and 283 transitions. [2022-04-06 15:04:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 15:04:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-04-06 15:04:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:14,064 INFO L225 Difference]: With dead ends: 246 [2022-04-06 15:04:14,064 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 15:04:14,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 15:04:14,066 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:14,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 823 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 15:04:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 15:04:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-04-06 15:04:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 188 states have (on average 1.196808510638298) internal successors, (225), 208 states have internal predecessors, (225), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) [2022-04-06 15:04:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 263 transitions. [2022-04-06 15:04:14,159 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 263 transitions. Word has length 45 [2022-04-06 15:04:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:14,159 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 263 transitions. [2022-04-06 15:04:14,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 263 transitions. [2022-04-06 15:04:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 15:04:14,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:14,161 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:14,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 15:04:14,364 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,SelfDestructingSolverStorable36 [2022-04-06 15:04:14,365 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:14,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1761268627, now seen corresponding path program 30 times [2022-04-06 15:04:14,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:14,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [936823139] [2022-04-06 15:04:14,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:04:14,459 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:14,459 INFO L85 PathProgramCache]: Analyzing trace with hash 179856046, now seen corresponding path program 1 times [2022-04-06 15:04:14,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:14,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54584079] [2022-04-06 15:04:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:14,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:14,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:04:14,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325080701] [2022-04-06 15:04:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:14,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:14,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:14,465 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 15:04:14,466 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 15:04:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 15:04:14,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:16,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:18,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:18,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54584079] [2022-04-06 15:04:18,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:04:18,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325080701] [2022-04-06 15:04:18,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325080701] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:18,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:04:18,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 30 [2022-04-06 15:04:18,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [936823139] [2022-04-06 15:04:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [936823139] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:18,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:18,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:04:18,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279241995] [2022-04-06 15:04:18,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:18,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 15:04:18,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 15:04:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2022-04-06 15:04:18,572 INFO L87 Difference]: Start difference. First operand 227 states and 263 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:21,574 INFO L93 Difference]: Finished difference Result 290 states and 337 transitions. [2022-04-06 15:04:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 15:04:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-04-06 15:04:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:21,576 INFO L225 Difference]: With dead ends: 290 [2022-04-06 15:04:21,577 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 15:04:21,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 15:04:21,578 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 72 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:21,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1731 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 15:04:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 15:04:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 243. [2022-04-06 15:04:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 201 states have (on average 1.199004975124378) internal successors, (241), 223 states have internal predecessors, (241), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (26), 14 states have call predecessors, (26), 14 states have call successors, (26) [2022-04-06 15:04:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 283 transitions. [2022-04-06 15:04:21,660 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 283 transitions. Word has length 45 [2022-04-06 15:04:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:21,660 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 283 transitions. [2022-04-06 15:04:21,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 283 transitions. [2022-04-06 15:04:21,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 15:04:21,661 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:21,661 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:21,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 15:04:21,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:21,874 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1979324864, now seen corresponding path program 31 times [2022-04-06 15:04:21,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:21,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [186684053] [2022-04-06 15:04:21,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:04:21,974 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2005154977, now seen corresponding path program 1 times [2022-04-06 15:04:21,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:21,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236072758] [2022-04-06 15:04:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:21,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:04:21,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362295749] [2022-04-06 15:04:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:21,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:21,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:21,979 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 15:04:21,980 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 15:04:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 15:04:22,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:04:23,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:04:25,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:25,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236072758] [2022-04-06 15:04:25,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:04:25,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362295749] [2022-04-06 15:04:25,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362295749] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:25,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:04:25,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2022-04-06 15:04:26,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:26,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [186684053] [2022-04-06 15:04:26,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [186684053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:26,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:26,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 15:04:26,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683395313] [2022-04-06 15:04:26,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:26,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 15:04:26,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:26,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 15:04:26,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 15:04:26,163 INFO L87 Difference]: Start difference. First operand 243 states and 283 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:28,061 INFO L93 Difference]: Finished difference Result 261 states and 304 transitions. [2022-04-06 15:04:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 15:04:28,061 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 15:04:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:28,063 INFO L225 Difference]: With dead ends: 261 [2022-04-06 15:04:28,063 INFO L226 Difference]: Without dead ends: 255 [2022-04-06 15:04:28,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 15:04:28,065 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:28,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 517 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 15:04:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-04-06 15:04:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2022-04-06 15:04:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 208 states have (on average 1.2019230769230769) internal successors, (250), 232 states have internal predecessors, (250), 17 states have call successors, (17), 5 states have call predecessors, (17), 27 states have return successors, (29), 15 states have call predecessors, (29), 15 states have call successors, (29) [2022-04-06 15:04:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 296 transitions. [2022-04-06 15:04:28,148 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 296 transitions. Word has length 46 [2022-04-06 15:04:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:28,149 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 296 transitions. [2022-04-06 15:04:28,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 296 transitions. [2022-04-06 15:04:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 15:04:28,150 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:28,150 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:28,166 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 15:04:28,366 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,SelfDestructingSolverStorable38 [2022-04-06 15:04:28,366 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:28,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2013243203, now seen corresponding path program 32 times [2022-04-06 15:04:28,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:28,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335676018] [2022-04-06 15:04:28,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:04:28,465 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:28,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1437591012, now seen corresponding path program 1 times [2022-04-06 15:04:28,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:28,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145728882] [2022-04-06 15:04:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:28,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:28,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:04:28,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212286967] [2022-04-06 15:04:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:28,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:28,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:28,470 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 15:04:28,471 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 15:04:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:28,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 15:04:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:04:30,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:04:32,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145728882] [2022-04-06 15:04:32,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:04:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212286967] [2022-04-06 15:04:32,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212286967] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:32,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:04:32,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 32 [2022-04-06 15:04:32,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:32,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335676018] [2022-04-06 15:04:32,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335676018] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:32,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:32,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:04:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990920452] [2022-04-06 15:04:32,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:32,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 15:04:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 15:04:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 15:04:32,929 INFO L87 Difference]: Start difference. First operand 253 states and 296 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:35,704 INFO L93 Difference]: Finished difference Result 259 states and 301 transitions. [2022-04-06 15:04:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 15:04:35,704 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 15:04:35,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:35,705 INFO L225 Difference]: With dead ends: 259 [2022-04-06 15:04:35,706 INFO L226 Difference]: Without dead ends: 241 [2022-04-06 15:04:35,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 15:04:35,707 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 59 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:35,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1469 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 15:04:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-04-06 15:04:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-04-06 15:04:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 199 states have (on average 1.2010050251256281) internal successors, (239), 221 states have internal predecessors, (239), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2022-04-06 15:04:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 282 transitions. [2022-04-06 15:04:35,792 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 282 transitions. Word has length 46 [2022-04-06 15:04:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:35,793 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 282 transitions. [2022-04-06 15:04:35,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 282 transitions. [2022-04-06 15:04:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 15:04:35,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:35,794 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:35,815 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 15:04:36,007 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,SelfDestructingSolverStorable39 [2022-04-06 15:04:36,007 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:36,008 INFO L85 PathProgramCache]: Analyzing trace with hash 215774988, now seen corresponding path program 33 times [2022-04-06 15:04:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:36,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1953451313] [2022-04-06 15:04:36,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:04:36,111 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:36,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1056591915, now seen corresponding path program 1 times [2022-04-06 15:04:36,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:36,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985453087] [2022-04-06 15:04:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:36,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:36,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:04:36,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094108475] [2022-04-06 15:04:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:36,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:36,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:36,117 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 15:04:36,118 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 15:04:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 15:04:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:04:38,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:04:42,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:42,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985453087] [2022-04-06 15:04:42,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:04:42,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094108475] [2022-04-06 15:04:42,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094108475] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:42,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:04:42,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-04-06 15:04:44,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:44,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1953451313] [2022-04-06 15:04:44,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1953451313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:44,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:44,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 15:04:44,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408845538] [2022-04-06 15:04:44,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:44,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 15:04:44,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 15:04:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 15:04:44,268 INFO L87 Difference]: Start difference. First operand 241 states and 282 transitions. Second operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:48,116 INFO L93 Difference]: Finished difference Result 294 states and 347 transitions. [2022-04-06 15:04:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 15:04:48,117 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 15:04:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:48,120 INFO L225 Difference]: With dead ends: 294 [2022-04-06 15:04:48,120 INFO L226 Difference]: Without dead ends: 283 [2022-04-06 15:04:48,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 15:04:48,122 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 121 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:48,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 961 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 448 Invalid, 0 Unknown, 59 Unchecked, 1.6s Time] [2022-04-06 15:04:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-04-06 15:04:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 274. [2022-04-06 15:04:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 226 states have (on average 1.1991150442477876) internal successors, (271), 252 states have internal predecessors, (271), 18 states have call successors, (18), 5 states have call predecessors, (18), 29 states have return successors, (33), 16 states have call predecessors, (33), 16 states have call successors, (33) [2022-04-06 15:04:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 322 transitions. [2022-04-06 15:04:48,221 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 322 transitions. Word has length 46 [2022-04-06 15:04:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:48,221 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 322 transitions. [2022-04-06 15:04:48,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 322 transitions. [2022-04-06 15:04:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 15:04:48,223 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:48,223 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:48,245 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 15:04:48,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:48,435 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:48,436 INFO L85 PathProgramCache]: Analyzing trace with hash 256944047, now seen corresponding path program 34 times [2022-04-06 15:04:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:48,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359996598] [2022-04-06 15:04:48,541 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:04:48,541 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1362925710, now seen corresponding path program 1 times [2022-04-06 15:04:48,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:48,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560147126] [2022-04-06 15:04:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:48,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:48,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:04:48,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812036428] [2022-04-06 15:04:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:48,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:48,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:48,547 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 15:04:48,548 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 15:04:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:48,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 15:04:48,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:04:51,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:04:55,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560147126] [2022-04-06 15:04:55,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:04:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812036428] [2022-04-06 15:04:55,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812036428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:55,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:04:55,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-04-06 15:04:57,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:57,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359996598] [2022-04-06 15:04:57,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359996598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:57,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:57,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 15:04:57,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682954746] [2022-04-06 15:04:57,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:57,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 15:04:57,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:57,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 15:04:57,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 15:04:57,293 INFO L87 Difference]: Start difference. First operand 274 states and 322 transitions. Second operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:05:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:05:00,146 INFO L93 Difference]: Finished difference Result 289 states and 337 transitions. [2022-04-06 15:05:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 15:05:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 15:05:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:05:00,151 INFO L225 Difference]: With dead ends: 289 [2022-04-06 15:05:00,151 INFO L226 Difference]: Without dead ends: 277 [2022-04-06 15:05:00,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 15:05:00,153 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 64 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:05:00,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1243 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 669 Invalid, 0 Unknown, 1 Unchecked, 2.6s Time] [2022-04-06 15:05:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-06 15:05:00,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2022-04-06 15:05:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 227 states have (on average 1.198237885462555) internal successors, (272), 253 states have internal predecessors, (272), 18 states have call successors, (18), 5 states have call predecessors, (18), 29 states have return successors, (30), 16 states have call predecessors, (30), 16 states have call successors, (30) [2022-04-06 15:05:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 320 transitions. [2022-04-06 15:05:00,260 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 320 transitions. Word has length 46 [2022-04-06 15:05:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:05:00,260 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 320 transitions. [2022-04-06 15:05:00,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:05:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 320 transitions. [2022-04-06 15:05:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 15:05:00,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:05:00,262 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:05:00,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 15:05:00,463 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,SelfDestructingSolverStorable41 [2022-04-06 15:05:00,463 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:05:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:05:00,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1716301798, now seen corresponding path program 35 times [2022-04-06 15:05:00,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:00,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [260142489] [2022-04-06 15:05:00,560 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:05:00,560 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:05:00,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2134530907, now seen corresponding path program 1 times [2022-04-06 15:05:00,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820648696] [2022-04-06 15:05:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:00,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:00,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:05:00,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552703677] [2022-04-06 15:05:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:00,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:00,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:05:00,566 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 15:05:00,572 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 15:05:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:00,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 15:05:00,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:05:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:05:01,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:05:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:05:01,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:05:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820648696] [2022-04-06 15:05:01,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:05:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552703677] [2022-04-06 15:05:01,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552703677] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:05:01,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:05:01,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-04-06 15:05:01,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:05:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [260142489] [2022-04-06 15:05:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [260142489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:05:01,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:05:01,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:05:01,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985518506] [2022-04-06 15:05:01,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:05:01,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:05:01,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:01,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:05:01,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:05:01,798 INFO L87 Difference]: Start difference. First operand 275 states and 320 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:05:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:05:02,893 INFO L93 Difference]: Finished difference Result 367 states and 431 transitions. [2022-04-06 15:05:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 15:05:02,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2022-04-06 15:05:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:05:02,898 INFO L225 Difference]: With dead ends: 367 [2022-04-06 15:05:02,898 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 15:05:02,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-04-06 15:05:02,903 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 56 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:05:02,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 268 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 15:05:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 15:05:03,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 319. [2022-04-06 15:05:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 271 states have (on average 1.1918819188191883) internal successors, (323), 297 states have internal predecessors, (323), 18 states have call successors, (18), 5 states have call predecessors, (18), 29 states have return successors, (30), 16 states have call predecessors, (30), 16 states have call successors, (30) [2022-04-06 15:05:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 371 transitions. [2022-04-06 15:05:03,027 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 371 transitions. Word has length 47 [2022-04-06 15:05:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:05:03,027 INFO L478 AbstractCegarLoop]: Abstraction has 319 states and 371 transitions. [2022-04-06 15:05:03,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:05:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 371 transitions. [2022-04-06 15:05:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 15:05:03,029 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:05:03,029 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:05:03,047 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 15:05:03,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:03,243 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:05:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:05:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash 348175359, now seen corresponding path program 36 times [2022-04-06 15:05:03,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159531245] [2022-04-06 15:05:03,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:05:03,362 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:05:03,362 INFO L85 PathProgramCache]: Analyzing trace with hash -465787008, now seen corresponding path program 1 times [2022-04-06 15:05:03,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:03,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74849318] [2022-04-06 15:05:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:03,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:03,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:05:03,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307818816] [2022-04-06 15:05:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:03,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:03,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:05:03,368 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 15:05:03,370 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 15:05:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:03,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 15:05:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:05:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:05:27,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:05:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:05:39,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:05:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74849318] [2022-04-06 15:05:39,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:05:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307818816] [2022-04-06 15:05:39,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307818816] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:05:39,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:05:39,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2022-04-06 15:05:42,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:05:42,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159531245] [2022-04-06 15:05:42,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159531245] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:05:42,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:05:42,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 15:05:42,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21726882] [2022-04-06 15:05:42,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:05:42,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 15:05:42,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:42,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 15:05:42,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1218, Unknown=3, NotChecked=0, Total=1406 [2022-04-06 15:05:42,222 INFO L87 Difference]: Start difference. First operand 319 states and 371 transitions. Second operand has 23 states, 20 states have (on average 1.8) internal successors, (36), 22 states have internal predecessors, (36), 4 states have call successors, (5), 2 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 15:05:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:05:45,457 INFO L93 Difference]: Finished difference Result 375 states and 441 transitions. [2022-04-06 15:05:45,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 15:05:45,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 22 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-04-06 15:05:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:05:45,461 INFO L225 Difference]: With dead ends: 375 [2022-04-06 15:05:45,461 INFO L226 Difference]: Without dead ends: 360 [2022-04-06 15:05:45,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=211, Invalid=1346, Unknown=3, NotChecked=0, Total=1560 [2022-04-06 15:05:45,464 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 36 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:05:45,464 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 511 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 194 Invalid, 0 Unknown, 138 Unchecked, 0.7s Time] [2022-04-06 15:05:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-04-06 15:05:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 358. [2022-04-06 15:05:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 295 states have (on average 1.1898305084745762) internal successors, (351), 331 states have internal predecessors, (351), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (45), 21 states have call predecessors, (45), 21 states have call successors, (45) [2022-04-06 15:05:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 419 transitions. [2022-04-06 15:05:45,596 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 419 transitions. Word has length 47 [2022-04-06 15:05:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:05:45,597 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 419 transitions. [2022-04-06 15:05:45,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 22 states have internal predecessors, (36), 4 states have call successors, (5), 2 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 15:05:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 419 transitions. [2022-04-06 15:05:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 15:05:45,599 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:05:45,600 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:05:45,616 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 15:05:45,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:45,805 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:05:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:05:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1510099501, now seen corresponding path program 37 times [2022-04-06 15:05:45,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:45,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1028104864] [2022-04-06 15:05:45,908 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:05:45,909 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:05:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash 326309358, now seen corresponding path program 1 times [2022-04-06 15:05:45,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:45,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45654308] [2022-04-06 15:05:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:45,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:45,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:05:45,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820976764] [2022-04-06 15:05:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:45,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:45,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:05:45,914 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 15:05:45,915 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 15:05:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:45,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 15:05:45,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:05:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:05:48,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:05:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:05:50,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:05:50,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45654308] [2022-04-06 15:05:50,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:05:50,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820976764] [2022-04-06 15:05:50,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820976764] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:05:50,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:05:50,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 34 [2022-04-06 15:05:50,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:05:50,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1028104864] [2022-04-06 15:05:50,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1028104864] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:05:50,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:05:50,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:05:50,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965752300] [2022-04-06 15:05:50,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:05:50,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 15:05:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 15:05:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 15:05:50,349 INFO L87 Difference]: Start difference. First operand 358 states and 419 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:05:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:05:52,887 INFO L93 Difference]: Finished difference Result 364 states and 424 transitions. [2022-04-06 15:05:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 15:05:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 15:05:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:05:52,889 INFO L225 Difference]: With dead ends: 364 [2022-04-06 15:05:52,889 INFO L226 Difference]: Without dead ends: 345 [2022-04-06 15:05:52,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 15:05:52,892 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 15:05:52,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1064 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 15:05:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-04-06 15:05:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-04-06 15:05:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 285 states have (on average 1.1894736842105262) internal successors, (339), 319 states have internal predecessors, (339), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (43), 20 states have call predecessors, (43), 20 states have call successors, (43) [2022-04-06 15:05:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 404 transitions. [2022-04-06 15:05:53,037 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 404 transitions. Word has length 47 [2022-04-06 15:05:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:05:53,038 INFO L478 AbstractCegarLoop]: Abstraction has 345 states and 404 transitions. [2022-04-06 15:05:53,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:05:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 404 transitions. [2022-04-06 15:05:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 15:05:53,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:05:53,040 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:05:53,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 15:05:53,242 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,SelfDestructingSolverStorable44 [2022-04-06 15:05:53,243 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:05:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:05:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1644141558, now seen corresponding path program 38 times [2022-04-06 15:05:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1685061096] [2022-04-06 15:05:53,353 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:05:53,354 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:05:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1097207819, now seen corresponding path program 1 times [2022-04-06 15:05:53,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:53,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027011263] [2022-04-06 15:05:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:53,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:53,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:05:53,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107833337] [2022-04-06 15:05:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:53,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:53,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:05:53,359 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 15:05:53,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 15:05:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:53,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 15:05:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:05:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:56,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:05:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:57,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:05:57,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027011263] [2022-04-06 15:05:57,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:05:57,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107833337] [2022-04-06 15:05:57,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107833337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:05:57,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:05:57,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 32 [2022-04-06 15:05:58,182 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:05:58,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1685061096] [2022-04-06 15:05:58,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1685061096] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:05:58,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:05:58,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 15:05:58,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212975840] [2022-04-06 15:05:58,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:05:58,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 15:05:58,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 15:05:58,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 15:05:58,183 INFO L87 Difference]: Start difference. First operand 345 states and 404 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:02,162 INFO L93 Difference]: Finished difference Result 422 states and 495 transitions. [2022-04-06 15:06:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 15:06:02,162 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 15:06:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:02,165 INFO L225 Difference]: With dead ends: 422 [2022-04-06 15:06:02,165 INFO L226 Difference]: Without dead ends: 416 [2022-04-06 15:06:02,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=96, Invalid=1310, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 15:06:02,168 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 84 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:02,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 2248 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 15:06:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-04-06 15:06:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 361. [2022-04-06 15:06:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 298 states have (on average 1.191275167785235) internal successors, (355), 334 states have internal predecessors, (355), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (46), 21 states have call predecessors, (46), 21 states have call successors, (46) [2022-04-06 15:06:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 424 transitions. [2022-04-06 15:06:02,312 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 424 transitions. Word has length 47 [2022-04-06 15:06:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:02,312 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 424 transitions. [2022-04-06 15:06:02,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 424 transitions. [2022-04-06 15:06:02,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 15:06:02,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:02,315 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:06:02,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:02,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 15:06:02,531 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1136723602, now seen corresponding path program 39 times [2022-04-06 15:06:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:02,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [272215005] [2022-04-06 15:06:02,642 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:06:02,642 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:06:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash -633998003, now seen corresponding path program 1 times [2022-04-06 15:06:02,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:02,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498687823] [2022-04-06 15:06:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:02,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:02,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:06:02,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425616099] [2022-04-06 15:06:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:02,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:02,648 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:02,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 15:06:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 15:06:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 15:06:06,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 15:06:13,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:13,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498687823] [2022-04-06 15:06:13,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:06:13,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425616099] [2022-04-06 15:06:13,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425616099] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:13,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:06:13,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2022-04-06 15:06:15,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:15,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [272215005] [2022-04-06 15:06:15,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [272215005] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:15,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:15,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 15:06:15,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31003418] [2022-04-06 15:06:15,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:15,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 15:06:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:15,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 15:06:15,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 15:06:15,700 INFO L87 Difference]: Start difference. First operand 361 states and 424 transitions. Second operand has 23 states, 20 states have (on average 1.8) internal successors, (36), 22 states have internal predecessors, (36), 4 states have call successors, (5), 2 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 15:06:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:17,678 INFO L93 Difference]: Finished difference Result 367 states and 429 transitions. [2022-04-06 15:06:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 15:06:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 22 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2022-04-06 15:06:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:17,680 INFO L225 Difference]: With dead ends: 367 [2022-04-06 15:06:17,680 INFO L226 Difference]: Without dead ends: 356 [2022-04-06 15:06:17,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 15:06:17,682 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 44 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:17,682 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 824 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 204 Unchecked, 0.6s Time] [2022-04-06 15:06:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-04-06 15:06:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2022-04-06 15:06:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 292 states have (on average 1.1883561643835616) internal successors, (347), 326 states have internal predecessors, (347), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-06 15:06:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 407 transitions. [2022-04-06 15:06:17,824 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 407 transitions. Word has length 48 [2022-04-06 15:06:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:17,824 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 407 transitions. [2022-04-06 15:06:17,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 22 states have internal predecessors, (36), 4 states have call successors, (5), 2 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 15:06:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 407 transitions. [2022-04-06 15:06:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 15:06:17,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:17,826 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:06:17,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 15:06:18,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 15:06:18,039 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash -76047475, now seen corresponding path program 40 times [2022-04-06 15:06:18,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:18,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [481163418] [2022-04-06 15:06:18,142 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:06:18,143 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:06:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1846918956, now seen corresponding path program 1 times [2022-04-06 15:06:18,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:18,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177560511] [2022-04-06 15:06:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:18,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:18,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:06:18,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123040046] [2022-04-06 15:06:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:18,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:18,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:18,148 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:18,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 15:06:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 15:06:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 15:06:18,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 15:06:19,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:19,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177560511] [2022-04-06 15:06:19,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:06:19,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123040046] [2022-04-06 15:06:19,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123040046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:19,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:06:19,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-04-06 15:06:19,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [481163418] [2022-04-06 15:06:19,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [481163418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:19,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:19,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 15:06:19,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876123734] [2022-04-06 15:06:19,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:19,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 15:06:19,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 15:06:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:06:19,414 INFO L87 Difference]: Start difference. First operand 352 states and 407 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:06:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:19,820 INFO L93 Difference]: Finished difference Result 382 states and 442 transitions. [2022-04-06 15:06:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 15:06:19,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-04-06 15:06:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:19,823 INFO L225 Difference]: With dead ends: 382 [2022-04-06 15:06:19,823 INFO L226 Difference]: Without dead ends: 358 [2022-04-06 15:06:19,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:06:19,827 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 68 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:19,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 198 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 15:06:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-04-06 15:06:19,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2022-04-06 15:06:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 298 states have (on average 1.1845637583892616) internal successors, (353), 332 states have internal predecessors, (353), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-04-06 15:06:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 413 transitions. [2022-04-06 15:06:19,968 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 413 transitions. Word has length 48 [2022-04-06 15:06:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:19,968 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 413 transitions. [2022-04-06 15:06:19,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:06:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 413 transitions. [2022-04-06 15:06:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 15:06:19,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:19,970 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:06:19,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:20,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:20,171 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -465556867, now seen corresponding path program 41 times [2022-04-06 15:06:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:20,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769295170] [2022-04-06 15:06:20,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:06:20,269 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:06:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1417316900, now seen corresponding path program 1 times [2022-04-06 15:06:20,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:20,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619672609] [2022-04-06 15:06:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:20,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:20,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:06:20,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987814552] [2022-04-06 15:06:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:20,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:20,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:20,274 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:20,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 15:06:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 15:06:20,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:06:22,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:06:24,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:24,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619672609] [2022-04-06 15:06:24,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:06:24,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987814552] [2022-04-06 15:06:24,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987814552] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:24,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:06:24,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 36 [2022-04-06 15:06:25,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769295170] [2022-04-06 15:06:25,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769295170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:25,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:25,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:06:25,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105655160] [2022-04-06 15:06:25,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:25,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 15:06:25,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:25,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 15:06:25,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1240, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 15:06:25,128 INFO L87 Difference]: Start difference. First operand 358 states and 413 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:27,544 INFO L93 Difference]: Finished difference Result 364 states and 418 transitions. [2022-04-06 15:06:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 15:06:27,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-06 15:06:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:27,546 INFO L225 Difference]: With dead ends: 364 [2022-04-06 15:06:27,546 INFO L226 Difference]: Without dead ends: 344 [2022-04-06 15:06:27,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 15:06:27,548 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:27,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 834 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 15:06:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-04-06 15:06:27,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-04-06 15:06:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 287 states have (on average 1.1846689895470384) internal successors, (340), 319 states have internal predecessors, (340), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-04-06 15:06:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 397 transitions. [2022-04-06 15:06:27,685 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 397 transitions. Word has length 48 [2022-04-06 15:06:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:27,685 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 397 transitions. [2022-04-06 15:06:27,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 397 transitions. [2022-04-06 15:06:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 15:06:27,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:27,687 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:06:27,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:27,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 15:06:27,892 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:27,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1127825248, now seen corresponding path program 42 times [2022-04-06 15:06:27,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:27,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1845222372] [2022-04-06 15:06:27,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:06:27,992 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:06:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1596306047, now seen corresponding path program 1 times [2022-04-06 15:06:27,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:27,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787525804] [2022-04-06 15:06:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:27,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:27,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:06:27,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007164459] [2022-04-06 15:06:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:27,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:27,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:27,998 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:27,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 15:06:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:28,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 15:06:28,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:06:30,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:06:32,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:32,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787525804] [2022-04-06 15:06:32,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:06:32,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007164459] [2022-04-06 15:06:32,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007164459] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:32,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:06:32,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 34 [2022-04-06 15:06:33,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:33,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1845222372] [2022-04-06 15:06:33,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1845222372] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:33,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:33,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 15:06:33,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441858844] [2022-04-06 15:06:33,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:33,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 15:06:33,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:33,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 15:06:33,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 15:06:33,139 INFO L87 Difference]: Start difference. First operand 344 states and 397 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:36,516 INFO L93 Difference]: Finished difference Result 350 states and 402 transitions. [2022-04-06 15:06:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 15:06:36,516 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-06 15:06:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:36,518 INFO L225 Difference]: With dead ends: 350 [2022-04-06 15:06:36,518 INFO L226 Difference]: Without dead ends: 332 [2022-04-06 15:06:36,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 15:06:36,520 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 71 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:36,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1872 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 15:06:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-04-06 15:06:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-04-06 15:06:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 278 states have (on average 1.183453237410072) internal successors, (329), 308 states have internal predecessors, (329), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2022-04-06 15:06:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 383 transitions. [2022-04-06 15:06:36,654 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 383 transitions. Word has length 48 [2022-04-06 15:06:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:36,654 INFO L478 AbstractCegarLoop]: Abstraction has 332 states and 383 transitions. [2022-04-06 15:06:36,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 383 transitions. [2022-04-06 15:06:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 15:06:36,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:36,656 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:06:36,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 15:06:36,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 15:06:36,858 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:36,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:36,858 INFO L85 PathProgramCache]: Analyzing trace with hash -448253169, now seen corresponding path program 43 times [2022-04-06 15:06:36,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:36,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854521643] [2022-04-06 15:06:36,971 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:06:36,972 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:06:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1440468462, now seen corresponding path program 1 times [2022-04-06 15:06:36,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:36,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666227489] [2022-04-06 15:06:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:36,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:36,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:06:36,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855416158] [2022-04-06 15:06:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:36,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:36,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:36,977 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:36,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 15:06:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 15:06:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:06:40,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:06:46,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666227489] [2022-04-06 15:06:46,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:06:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855416158] [2022-04-06 15:06:46,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855416158] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:46,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:06:46,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2022-04-06 15:06:48,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:48,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854521643] [2022-04-06 15:06:48,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854521643] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:48,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:48,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 15:06:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145572260] [2022-04-06 15:06:48,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:48,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 15:06:48,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:48,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 15:06:48,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 15:06:48,046 INFO L87 Difference]: Start difference. First operand 332 states and 383 transitions. Second operand has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:53,270 INFO L93 Difference]: Finished difference Result 402 states and 469 transitions. [2022-04-06 15:06:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 15:06:53,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-06 15:06:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:53,277 INFO L225 Difference]: With dead ends: 402 [2022-04-06 15:06:53,277 INFO L226 Difference]: Without dead ends: 391 [2022-04-06 15:06:53,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=331, Invalid=2119, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 15:06:53,282 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 163 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:53,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1058 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 563 Invalid, 0 Unknown, 1 Unchecked, 2.2s Time] [2022-04-06 15:06:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-04-06 15:06:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 382. [2022-04-06 15:06:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 319 states have (on average 1.1818181818181819) internal successors, (377), 355 states have internal predecessors, (377), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (43), 21 states have call predecessors, (43), 21 states have call successors, (43) [2022-04-06 15:06:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 443 transitions. [2022-04-06 15:06:53,444 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 443 transitions. Word has length 48 [2022-04-06 15:06:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:53,444 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 443 transitions. [2022-04-06 15:06:53,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 443 transitions. [2022-04-06 15:06:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 15:06:53,447 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:53,447 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:06:53,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 15:06:53,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:53,648 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash 827987660, now seen corresponding path program 44 times [2022-04-06 15:06:53,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:53,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [501965760] [2022-04-06 15:06:53,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:06:53,761 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:06:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash -158017173, now seen corresponding path program 1 times [2022-04-06 15:06:53,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:53,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696451903] [2022-04-06 15:06:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:53,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:53,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:06:53,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003039067] [2022-04-06 15:06:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:53,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:53,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:53,766 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:06:53,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 15:06:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 15:06:53,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:06:57,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:07:03,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:03,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696451903] [2022-04-06 15:07:03,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:03,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003039067] [2022-04-06 15:07:03,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003039067] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:07:03,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:07:03,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2022-04-06 15:07:05,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:05,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [501965760] [2022-04-06 15:07:05,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [501965760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:05,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:05,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 15:07:05,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372954159] [2022-04-06 15:07:05,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:05,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 15:07:05,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 15:07:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 15:07:05,833 INFO L87 Difference]: Start difference. First operand 382 states and 443 transitions. Second operand has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:09,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:09,527 INFO L93 Difference]: Finished difference Result 397 states and 458 transitions. [2022-04-06 15:07:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 15:07:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-04-06 15:07:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:09,533 INFO L225 Difference]: With dead ends: 397 [2022-04-06 15:07:09,533 INFO L226 Difference]: Without dead ends: 385 [2022-04-06 15:07:09,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 15:07:09,536 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 76 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:09,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1498 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 811 Invalid, 0 Unknown, 1 Unchecked, 3.3s Time] [2022-04-06 15:07:09,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-04-06 15:07:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2022-04-06 15:07:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 320 states have (on average 1.18125) internal successors, (378), 356 states have internal predecessors, (378), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (39), 21 states have call predecessors, (39), 21 states have call successors, (39) [2022-04-06 15:07:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 440 transitions. [2022-04-06 15:07:09,705 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 440 transitions. Word has length 48 [2022-04-06 15:07:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:09,705 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 440 transitions. [2022-04-06 15:07:09,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 440 transitions. [2022-04-06 15:07:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 15:07:09,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:09,708 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:09,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:09,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 15:07:09,926 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:09,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1008334867, now seen corresponding path program 45 times [2022-04-06 15:07:09,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:09,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025105823] [2022-04-06 15:07:10,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:07:10,034 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:07:10,035 INFO L85 PathProgramCache]: Analyzing trace with hash -431920786, now seen corresponding path program 1 times [2022-04-06 15:07:10,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:10,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874873416] [2022-04-06 15:07:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:10,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:10,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:10,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106162694] [2022-04-06 15:07:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:10,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:10,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:10,060 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:10,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 15:07:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:10,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 15:07:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 15:07:12,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 15:07:14,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:14,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874873416] [2022-04-06 15:07:14,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:14,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106162694] [2022-04-06 15:07:14,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106162694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:07:14,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:07:14,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2022-04-06 15:07:14,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025105823] [2022-04-06 15:07:14,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025105823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:14,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:14,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:07:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127439762] [2022-04-06 15:07:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:14,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 15:07:14,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:14,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 15:07:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 15:07:14,916 INFO L87 Difference]: Start difference. First operand 383 states and 440 transitions. Second operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:17,272 INFO L93 Difference]: Finished difference Result 401 states and 461 transitions. [2022-04-06 15:07:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 15:07:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-06 15:07:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:17,275 INFO L225 Difference]: With dead ends: 401 [2022-04-06 15:07:17,275 INFO L226 Difference]: Without dead ends: 395 [2022-04-06 15:07:17,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 15:07:17,278 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:17,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 598 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 15:07:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-04-06 15:07:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 393. [2022-04-06 15:07:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 327 states have (on average 1.18348623853211) internal successors, (387), 365 states have internal predecessors, (387), 24 states have call successors, (24), 5 states have call predecessors, (24), 41 states have return successors, (42), 22 states have call predecessors, (42), 22 states have call successors, (42) [2022-04-06 15:07:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 453 transitions. [2022-04-06 15:07:17,451 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 453 transitions. Word has length 49 [2022-04-06 15:07:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:17,452 INFO L478 AbstractCegarLoop]: Abstraction has 393 states and 453 transitions. [2022-04-06 15:07:17,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 453 transitions. [2022-04-06 15:07:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 15:07:17,454 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:17,454 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:17,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:17,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:17,654 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:17,655 INFO L85 PathProgramCache]: Analyzing trace with hash 343323402, now seen corresponding path program 46 times [2022-04-06 15:07:17,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:17,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302165547] [2022-04-06 15:07:17,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:07:17,759 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:07:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1997530315, now seen corresponding path program 1 times [2022-04-06 15:07:17,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:17,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755139321] [2022-04-06 15:07:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:17,763 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:17,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077342373] [2022-04-06 15:07:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:17,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:17,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:17,764 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:17,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 15:07:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:17,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 15:07:17,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:07:20,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:07:22,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:22,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755139321] [2022-04-06 15:07:22,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:22,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077342373] [2022-04-06 15:07:22,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077342373] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:07:22,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:07:22,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2022-04-06 15:07:22,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:22,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302165547] [2022-04-06 15:07:22,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302165547] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:22,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:22,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 15:07:22,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036873960] [2022-04-06 15:07:22,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:22,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 15:07:22,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:22,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 15:07:22,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 15:07:22,968 INFO L87 Difference]: Start difference. First operand 393 states and 453 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:26,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:26,554 INFO L93 Difference]: Finished difference Result 399 states and 458 transitions. [2022-04-06 15:07:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 15:07:26,554 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-06 15:07:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:26,556 INFO L225 Difference]: With dead ends: 399 [2022-04-06 15:07:26,556 INFO L226 Difference]: Without dead ends: 380 [2022-04-06 15:07:26,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 15:07:26,558 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 59 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:26,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1716 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 15:07:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-04-06 15:07:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-04-06 15:07:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 317 states have (on average 1.1829652996845426) internal successors, (375), 353 states have internal predecessors, (375), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (40), 21 states have call predecessors, (40), 21 states have call successors, (40) [2022-04-06 15:07:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 438 transitions. [2022-04-06 15:07:26,720 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 438 transitions. Word has length 49 [2022-04-06 15:07:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:26,720 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 438 transitions. [2022-04-06 15:07:26,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 438 transitions. [2022-04-06 15:07:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 15:07:26,722 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:26,722 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:26,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:26,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 15:07:26,935 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:26,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1121658739, now seen corresponding path program 47 times [2022-04-06 15:07:26,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:26,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362585918] [2022-04-06 15:07:27,035 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:07:27,035 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:07:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1610341006, now seen corresponding path program 1 times [2022-04-06 15:07:27,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:27,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124752322] [2022-04-06 15:07:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:27,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:27,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20793012] [2022-04-06 15:07:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:27,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:27,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:27,041 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:27,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 15:07:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 15:07:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:07:30,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:07:31,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:31,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124752322] [2022-04-06 15:07:31,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:31,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20793012] [2022-04-06 15:07:31,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20793012] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:07:31,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:07:31,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 34 [2022-04-06 15:07:32,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:32,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362585918] [2022-04-06 15:07:32,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362585918] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:32,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:32,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 15:07:32,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037389690] [2022-04-06 15:07:32,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:32,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 15:07:32,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:32,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 15:07:32,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 15:07:32,214 INFO L87 Difference]: Start difference. First operand 380 states and 438 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:36,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:36,689 INFO L93 Difference]: Finished difference Result 458 states and 529 transitions. [2022-04-06 15:07:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 15:07:36,689 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-06 15:07:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:36,692 INFO L225 Difference]: With dead ends: 458 [2022-04-06 15:07:36,692 INFO L226 Difference]: Without dead ends: 452 [2022-04-06 15:07:36,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=100, Invalid=1460, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 15:07:36,694 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 96 mSDsluCounter, 2653 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:36,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 2758 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 15:07:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-04-06 15:07:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 396. [2022-04-06 15:07:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 330 states have (on average 1.1848484848484848) internal successors, (391), 368 states have internal predecessors, (391), 24 states have call successors, (24), 5 states have call predecessors, (24), 41 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2022-04-06 15:07:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 458 transitions. [2022-04-06 15:07:36,865 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 458 transitions. Word has length 49 [2022-04-06 15:07:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:36,865 INFO L478 AbstractCegarLoop]: Abstraction has 396 states and 458 transitions. [2022-04-06 15:07:36,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 458 transitions. [2022-04-06 15:07:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 15:07:36,867 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:36,868 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:36,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:37,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 15:07:37,071 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash 155527053, now seen corresponding path program 48 times [2022-04-06 15:07:37,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1931307689] [2022-04-06 15:07:37,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:07:37,171 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:07:37,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1999987348, now seen corresponding path program 1 times [2022-04-06 15:07:37,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:37,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054197305] [2022-04-06 15:07:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:37,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:37,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:37,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110975470] [2022-04-06 15:07:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:37,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:37,177 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:37,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 15:07:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 15:07:37,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 15:07:37,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 15:07:38,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:38,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054197305] [2022-04-06 15:07:38,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:38,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110975470] [2022-04-06 15:07:38,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110975470] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:07:38,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:07:38,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2022-04-06 15:07:38,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1931307689] [2022-04-06 15:07:38,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1931307689] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:38,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:38,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 15:07:38,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262928480] [2022-04-06 15:07:38,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:38,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 15:07:38,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 15:07:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-04-06 15:07:38,813 INFO L87 Difference]: Start difference. First operand 396 states and 458 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:07:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:40,574 INFO L93 Difference]: Finished difference Result 509 states and 593 transitions. [2022-04-06 15:07:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 15:07:40,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-04-06 15:07:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:40,579 INFO L225 Difference]: With dead ends: 509 [2022-04-06 15:07:40,579 INFO L226 Difference]: Without dead ends: 475 [2022-04-06 15:07:40,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 15:07:40,583 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:40,583 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 322 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 15:07:40,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-04-06 15:07:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 454. [2022-04-06 15:07:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 388 states have (on average 1.1778350515463918) internal successors, (457), 426 states have internal predecessors, (457), 24 states have call successors, (24), 5 states have call predecessors, (24), 41 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2022-04-06 15:07:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 524 transitions. [2022-04-06 15:07:40,789 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 524 transitions. Word has length 50 [2022-04-06 15:07:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:40,789 INFO L478 AbstractCegarLoop]: Abstraction has 454 states and 524 transitions. [2022-04-06 15:07:40,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:07:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 524 transitions. [2022-04-06 15:07:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 15:07:40,793 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:40,793 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:40,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:40,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:40,994 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:40,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1323251378, now seen corresponding path program 49 times [2022-04-06 15:07:40,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:40,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [694245980] [2022-04-06 15:07:41,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:07:41,104 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:07:41,104 INFO L85 PathProgramCache]: Analyzing trace with hash -131959059, now seen corresponding path program 1 times [2022-04-06 15:07:41,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:41,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85540713] [2022-04-06 15:07:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:41,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:41,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:41,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265050704] [2022-04-06 15:07:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:41,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:41,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:41,111 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:41,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 15:07:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 15:07:41,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:08:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:08:12,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:08:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 15:08:23,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:08:23,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85540713] [2022-04-06 15:08:23,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:08:23,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265050704] [2022-04-06 15:08:23,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265050704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:08:23,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:08:23,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 45 [2022-04-06 15:08:30,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:08:30,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [694245980] [2022-04-06 15:08:30,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [694245980] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:08:30,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:08:30,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 15:08:30,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377596423] [2022-04-06 15:08:30,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:08:30,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 15:08:30,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:08:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 15:08:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2334, Unknown=4, NotChecked=0, Total=2652 [2022-04-06 15:08:30,251 INFO L87 Difference]: Start difference. First operand 454 states and 524 transitions. Second operand has 34 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 4 states have call successors, (5), 2 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 15:08:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:08:33,121 INFO L93 Difference]: Finished difference Result 499 states and 580 transitions. [2022-04-06 15:08:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 15:08:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2022-04-06 15:08:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:08:33,127 INFO L225 Difference]: With dead ends: 499 [2022-04-06 15:08:33,127 INFO L226 Difference]: Without dead ends: 483 [2022-04-06 15:08:33,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=368, Invalid=2708, Unknown=4, NotChecked=0, Total=3080 [2022-04-06 15:08:33,130 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:08:33,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 673 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 469 Invalid, 0 Unknown, 191 Unchecked, 1.6s Time] [2022-04-06 15:08:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-04-06 15:08:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 447. [2022-04-06 15:08:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 381 states have (on average 1.178477690288714) internal successors, (449), 419 states have internal predecessors, (449), 24 states have call successors, (24), 5 states have call predecessors, (24), 41 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2022-04-06 15:08:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 516 transitions. [2022-04-06 15:08:33,328 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 516 transitions. Word has length 50 [2022-04-06 15:08:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:08:33,328 INFO L478 AbstractCegarLoop]: Abstraction has 447 states and 516 transitions. [2022-04-06 15:08:33,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 4 states have call successors, (5), 2 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 15:08:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 516 transitions. [2022-04-06 15:08:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 15:08:33,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:08:33,331 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:08:33,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 15:08:33,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:08:33,547 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:08:33,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:08:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash -820344608, now seen corresponding path program 50 times [2022-04-06 15:08:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:08:33,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [442656475] [2022-04-06 15:08:33,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:08:33,642 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:08:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash -577212865, now seen corresponding path program 1 times [2022-04-06 15:08:33,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:08:33,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789522603] [2022-04-06 15:08:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:08:33,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:08:33,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:08:33,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433503234] [2022-04-06 15:08:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:08:33,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:08:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:08:33,647 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:08:33,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 15:08:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:08:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 15:08:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:08:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:08:36,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:08:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:08:38,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:08:38,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789522603] [2022-04-06 15:08:38,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:08:38,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433503234] [2022-04-06 15:08:38,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433503234] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:08:38,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:08:38,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 38 [2022-04-06 15:08:39,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:08:39,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [442656475] [2022-04-06 15:08:39,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [442656475] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:08:39,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:08:39,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 15:08:39,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733339229] [2022-04-06 15:08:39,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:08:39,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 15:08:39,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:08:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 15:08:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1386, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 15:08:39,047 INFO L87 Difference]: Start difference. First operand 447 states and 516 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:08:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:08:42,263 INFO L93 Difference]: Finished difference Result 453 states and 521 transitions. [2022-04-06 15:08:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 15:08:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 15:08:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:08:42,265 INFO L225 Difference]: With dead ends: 453 [2022-04-06 15:08:42,265 INFO L226 Difference]: Without dead ends: 433 [2022-04-06 15:08:42,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 15:08:42,268 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:08:42,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1317 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 15:08:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-04-06 15:08:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-04-06 15:08:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 370 states have (on average 1.1783783783783783) internal successors, (436), 406 states have internal predecessors, (436), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2022-04-06 15:08:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 500 transitions. [2022-04-06 15:08:42,467 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 500 transitions. Word has length 50 [2022-04-06 15:08:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:08:42,467 INFO L478 AbstractCegarLoop]: Abstraction has 433 states and 500 transitions. [2022-04-06 15:08:42,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:08:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 500 transitions. [2022-04-06 15:08:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 15:08:42,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:08:42,470 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:08:42,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 15:08:42,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:08:42,670 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:08:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:08:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2138801309, now seen corresponding path program 51 times [2022-04-06 15:08:42,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:08:42,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1471992373] [2022-04-06 15:08:42,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:08:42,777 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:08:42,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1433772476, now seen corresponding path program 1 times [2022-04-06 15:08:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:08:42,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245974384] [2022-04-06 15:08:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:08:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:08:42,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:08:42,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262671159] [2022-04-06 15:08:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:08:42,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:08:42,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:08:42,782 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:08:42,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 15:08:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:08:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 15:08:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:08:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:08:45,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:08:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:08:48,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:08:48,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245974384] [2022-04-06 15:08:48,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:08:48,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262671159] [2022-04-06 15:08:48,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262671159] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:08:48,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:08:48,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 36 [2022-04-06 15:08:48,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:08:48,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1471992373] [2022-04-06 15:08:48,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1471992373] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:08:48,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:08:48,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 15:08:48,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880689335] [2022-04-06 15:08:48,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:08:48,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 15:08:48,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:08:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 15:08:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 15:08:48,529 INFO L87 Difference]: Start difference. First operand 433 states and 500 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:08:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:08:52,616 INFO L93 Difference]: Finished difference Result 439 states and 505 transitions. [2022-04-06 15:08:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 15:08:52,616 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 15:08:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:08:52,618 INFO L225 Difference]: With dead ends: 439 [2022-04-06 15:08:52,618 INFO L226 Difference]: Without dead ends: 421 [2022-04-06 15:08:52,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 15:08:52,620 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 83 mSDsluCounter, 2235 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:08:52,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 2331 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 15:08:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-04-06 15:08:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2022-04-06 15:08:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 361 states have (on average 1.1772853185595569) internal successors, (425), 395 states have internal predecessors, (425), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-04-06 15:08:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 486 transitions. [2022-04-06 15:08:52,803 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 486 transitions. Word has length 50 [2022-04-06 15:08:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:08:52,803 INFO L478 AbstractCegarLoop]: Abstraction has 421 states and 486 transitions. [2022-04-06 15:08:52,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:08:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 486 transitions. [2022-04-06 15:08:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 15:08:52,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:08:52,806 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:08:52,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 15:08:53,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 15:08:53,006 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:08:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:08:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1431154964, now seen corresponding path program 52 times [2022-04-06 15:08:53,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:08:53,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1080667951] [2022-04-06 15:08:53,119 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:08:53,119 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:08:53,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1210622923, now seen corresponding path program 1 times [2022-04-06 15:08:53,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:08:53,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569316817] [2022-04-06 15:08:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:08:53,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:08:53,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:08:53,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718152488] [2022-04-06 15:08:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:08:53,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:08:53,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:08:53,125 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:08:53,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 15:08:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:08:53,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 15:08:53,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:08:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:08:58,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:09:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:09:05,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:09:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569316817] [2022-04-06 15:09:05,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:09:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718152488] [2022-04-06 15:09:05,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718152488] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:09:05,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:09:05,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2022-04-06 15:09:08,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:09:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1080667951] [2022-04-06 15:09:08,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1080667951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:09:08,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:09:08,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 15:09:08,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095952384] [2022-04-06 15:09:08,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:09:08,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 15:09:08,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:09:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 15:09:08,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 15:09:08,355 INFO L87 Difference]: Start difference. First operand 421 states and 486 transitions. Second operand has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:09:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:09:15,246 INFO L93 Difference]: Finished difference Result 499 states and 581 transitions. [2022-04-06 15:09:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 15:09:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 15:09:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:09:15,256 INFO L225 Difference]: With dead ends: 499 [2022-04-06 15:09:15,256 INFO L226 Difference]: Without dead ends: 488 [2022-04-06 15:09:15,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=407, Invalid=2673, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 15:09:15,259 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 211 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:09:15,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1324 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 618 Invalid, 0 Unknown, 44 Unchecked, 2.6s Time] [2022-04-06 15:09:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-04-06 15:09:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 479. [2022-04-06 15:09:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 410 states have (on average 1.175609756097561) internal successors, (482), 450 states have internal predecessors, (482), 25 states have call successors, (25), 5 states have call predecessors, (25), 43 states have return successors, (48), 23 states have call predecessors, (48), 23 states have call successors, (48) [2022-04-06 15:09:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 555 transitions. [2022-04-06 15:09:15,478 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 555 transitions. Word has length 50 [2022-04-06 15:09:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:09:15,478 INFO L478 AbstractCegarLoop]: Abstraction has 479 states and 555 transitions. [2022-04-06 15:09:15,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:09:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 555 transitions. [2022-04-06 15:09:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 15:09:15,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:09:15,481 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:09:15,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 15:09:15,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 15:09:15,695 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:09:15,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:09:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash -522394929, now seen corresponding path program 53 times [2022-04-06 15:09:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:09:15,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557150723] [2022-04-06 15:09:15,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:09:15,855 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:09:15,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1171222382, now seen corresponding path program 1 times [2022-04-06 15:09:15,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:09:15,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743104899] [2022-04-06 15:09:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:09:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:09:15,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:09:15,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587285250] [2022-04-06 15:09:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:09:15,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:09:15,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:09:15,860 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:09:15,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 15:09:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:09:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 15:09:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:09:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:09:21,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:09:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:09:29,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:09:29,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743104899] [2022-04-06 15:09:29,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:09:29,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587285250] [2022-04-06 15:09:29,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587285250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:09:29,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:09:29,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2022-04-06 15:09:32,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:09:32,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557150723] [2022-04-06 15:09:32,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557150723] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:09:32,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:09:32,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 15:09:32,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050048523] [2022-04-06 15:09:32,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:09:32,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 15:09:32,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:09:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 15:09:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 15:09:32,219 INFO L87 Difference]: Start difference. First operand 479 states and 555 transitions. Second operand has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:09:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:09:37,326 INFO L93 Difference]: Finished difference Result 494 states and 570 transitions. [2022-04-06 15:09:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 15:09:37,330 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 15:09:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:09:37,332 INFO L225 Difference]: With dead ends: 494 [2022-04-06 15:09:37,332 INFO L226 Difference]: Without dead ends: 482 [2022-04-06 15:09:37,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 15:09:37,335 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 88 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:09:37,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 2031 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1076 Invalid, 0 Unknown, 55 Unchecked, 4.6s Time] [2022-04-06 15:09:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-04-06 15:09:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 480. [2022-04-06 15:09:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 411 states have (on average 1.1751824817518248) internal successors, (483), 451 states have internal predecessors, (483), 25 states have call successors, (25), 5 states have call predecessors, (25), 43 states have return successors, (44), 23 states have call predecessors, (44), 23 states have call successors, (44) [2022-04-06 15:09:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 552 transitions. [2022-04-06 15:09:37,579 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 552 transitions. Word has length 50 [2022-04-06 15:09:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:09:37,580 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 552 transitions. [2022-04-06 15:09:37,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:09:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 552 transitions. [2022-04-06 15:09:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 15:09:37,583 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:09:37,583 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:09:37,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 15:09:37,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:09:37,792 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:09:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:09:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2073135809, now seen corresponding path program 54 times [2022-04-06 15:09:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:09:37,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52584407] [2022-04-06 15:09:37,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:09:37,905 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:09:37,905 INFO L85 PathProgramCache]: Analyzing trace with hash -438813504, now seen corresponding path program 1 times [2022-04-06 15:09:37,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:09:37,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854099752] [2022-04-06 15:09:37,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:09:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:09:37,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:09:37,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218542019] [2022-04-06 15:09:37,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:09:37,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:09:37,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:09:37,921 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:09:37,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 15:09:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:09:37,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 15:09:38,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:09:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 15:09:43,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:09:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 15:09:55,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:09:55,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854099752] [2022-04-06 15:09:55,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:09:55,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218542019] [2022-04-06 15:09:55,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218542019] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:09:55,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:09:55,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-04-06 15:09:58,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:09:58,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52584407] [2022-04-06 15:09:58,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52584407] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:09:58,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:09:58,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 15:09:58,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520440870] [2022-04-06 15:09:58,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:09:58,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 15:09:58,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:09:58,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 15:09:58,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1689, Unknown=2, NotChecked=0, Total=1892 [2022-04-06 15:09:58,319 INFO L87 Difference]: Start difference. First operand 480 states and 552 transitions. Second operand has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (5), 2 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 15:10:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:00,871 INFO L93 Difference]: Finished difference Result 549 states and 641 transitions. [2022-04-06 15:10:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 15:10:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2022-04-06 15:10:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:00,878 INFO L225 Difference]: With dead ends: 549 [2022-04-06 15:10:00,878 INFO L226 Difference]: Without dead ends: 538 [2022-04-06 15:10:00,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=210, Invalid=1768, Unknown=2, NotChecked=0, Total=1980 [2022-04-06 15:10:00,882 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 45 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:00,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 987 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 259 Unchecked, 0.9s Time] [2022-04-06 15:10:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-04-06 15:10:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 534. [2022-04-06 15:10:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 447 states have (on average 1.1722595078299776) internal successors, (524), 499 states have internal predecessors, (524), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (62), 29 states have call predecessors, (62), 29 states have call successors, (62) [2022-04-06 15:10:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 617 transitions. [2022-04-06 15:10:01,180 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 617 transitions. Word has length 51 [2022-04-06 15:10:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:01,180 INFO L478 AbstractCegarLoop]: Abstraction has 534 states and 617 transitions. [2022-04-06 15:10:01,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (5), 2 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 15:10:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 617 transitions. [2022-04-06 15:10:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 15:10:01,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:01,184 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:01,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 15:10:01,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:01,392 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1837062470, now seen corresponding path program 55 times [2022-04-06 15:10:01,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:01,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [435839561] [2022-04-06 15:10:01,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:10:01,516 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:10:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash 469053051, now seen corresponding path program 1 times [2022-04-06 15:10:01,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:01,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167346909] [2022-04-06 15:10:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:01,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:01,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550465894] [2022-04-06 15:10:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:01,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:01,522 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:10:01,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 15:10:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:01,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 15:10:01,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 15:10:02,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 15:10:03,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:03,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167346909] [2022-04-06 15:10:03,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:03,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550465894] [2022-04-06 15:10:03,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550465894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:03,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:03,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-04-06 15:10:03,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:03,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [435839561] [2022-04-06 15:10:03,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [435839561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:03,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:03,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 15:10:03,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888340225] [2022-04-06 15:10:03,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:03,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 15:10:03,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:03,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 15:10:03,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-04-06 15:10:03,262 INFO L87 Difference]: Start difference. First operand 534 states and 617 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:10:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:03,935 INFO L93 Difference]: Finished difference Result 572 states and 662 transitions. [2022-04-06 15:10:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 15:10:03,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-04-06 15:10:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:03,941 INFO L225 Difference]: With dead ends: 572 [2022-04-06 15:10:03,941 INFO L226 Difference]: Without dead ends: 542 [2022-04-06 15:10:03,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-04-06 15:10:03,945 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:03,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 305 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 15:10:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-04-06 15:10:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2022-04-06 15:10:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 455 states have (on average 1.1692307692307693) internal successors, (532), 507 states have internal predecessors, (532), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (62), 29 states have call predecessors, (62), 29 states have call successors, (62) [2022-04-06 15:10:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 625 transitions. [2022-04-06 15:10:04,211 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 625 transitions. Word has length 51 [2022-04-06 15:10:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:04,211 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 625 transitions. [2022-04-06 15:10:04,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:10:04,212 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 625 transitions. [2022-04-06 15:10:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 15:10:04,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:04,215 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:04,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 15:10:04,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:04,419 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1950338550, now seen corresponding path program 56 times [2022-04-06 15:10:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:04,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [97174182] [2022-04-06 15:10:04,540 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:10:04,541 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:10:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1027570187, now seen corresponding path program 1 times [2022-04-06 15:10:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:04,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986818430] [2022-04-06 15:10:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:04,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:04,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096826979] [2022-04-06 15:10:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:04,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:04,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:04,546 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:10:04,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 15:10:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 15:10:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 15:10:07,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 15:10:09,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:09,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986818430] [2022-04-06 15:10:09,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:09,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096826979] [2022-04-06 15:10:09,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096826979] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:09,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:09,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 40 [2022-04-06 15:10:10,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:10,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [97174182] [2022-04-06 15:10:10,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [97174182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:10,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:10,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 15:10:10,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432094698] [2022-04-06 15:10:10,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:10,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 15:10:10,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:10,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 15:10:10,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 15:10:10,225 INFO L87 Difference]: Start difference. First operand 542 states and 625 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:13,302 INFO L93 Difference]: Finished difference Result 548 states and 630 transitions. [2022-04-06 15:10:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 15:10:13,302 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 15:10:13,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:13,305 INFO L225 Difference]: With dead ends: 548 [2022-04-06 15:10:13,305 INFO L226 Difference]: Without dead ends: 537 [2022-04-06 15:10:13,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=128, Invalid=1942, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 15:10:13,309 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:13,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 906 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 15:10:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-04-06 15:10:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 534. [2022-04-06 15:10:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 450 states have (on average 1.1688888888888889) internal successors, (526), 500 states have internal predecessors, (526), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (59), 28 states have call predecessors, (59), 28 states have call successors, (59) [2022-04-06 15:10:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 615 transitions. [2022-04-06 15:10:13,573 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 615 transitions. Word has length 51 [2022-04-06 15:10:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:13,573 INFO L478 AbstractCegarLoop]: Abstraction has 534 states and 615 transitions. [2022-04-06 15:10:13,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 615 transitions. [2022-04-06 15:10:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 15:10:13,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:13,577 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:13,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 15:10:13,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:13,777 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash 603717197, now seen corresponding path program 57 times [2022-04-06 15:10:13,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:13,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1428941387] [2022-04-06 15:10:13,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:10:13,887 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:10:13,888 INFO L85 PathProgramCache]: Analyzing trace with hash -41548146, now seen corresponding path program 1 times [2022-04-06 15:10:13,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:13,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654487659] [2022-04-06 15:10:13,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:13,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:13,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:13,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28662192] [2022-04-06 15:10:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:13,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:13,893 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:10:13,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 15:10:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:13,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 15:10:13,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:10:16,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:10:19,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:19,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654487659] [2022-04-06 15:10:19,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:19,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28662192] [2022-04-06 15:10:19,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28662192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:19,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:19,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 38 [2022-04-06 15:10:19,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:19,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1428941387] [2022-04-06 15:10:19,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1428941387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:19,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:19,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 15:10:19,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927652017] [2022-04-06 15:10:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:19,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 15:10:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 15:10:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 15:10:19,969 INFO L87 Difference]: Start difference. First operand 534 states and 615 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:23,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:23,576 INFO L93 Difference]: Finished difference Result 540 states and 620 transitions. [2022-04-06 15:10:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 15:10:23,576 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 15:10:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:23,578 INFO L225 Difference]: With dead ends: 540 [2022-04-06 15:10:23,578 INFO L226 Difference]: Without dead ends: 521 [2022-04-06 15:10:23,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=116, Invalid=1776, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 15:10:23,585 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 71 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:23,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1738 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 15:10:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-04-06 15:10:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2022-04-06 15:10:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 440 states have (on average 1.1681818181818182) internal successors, (514), 488 states have internal predecessors, (514), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (57), 27 states have call predecessors, (57), 27 states have call successors, (57) [2022-04-06 15:10:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 600 transitions. [2022-04-06 15:10:23,842 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 600 transitions. Word has length 51 [2022-04-06 15:10:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:23,842 INFO L478 AbstractCegarLoop]: Abstraction has 521 states and 600 transitions. [2022-04-06 15:10:23,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 600 transitions. [2022-04-06 15:10:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 15:10:23,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:23,846 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:23,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 15:10:24,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 15:10:24,050 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash -33846038, now seen corresponding path program 58 times [2022-04-06 15:10:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:24,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [434346910] [2022-04-06 15:10:24,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:10:24,162 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:10:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash -7318165, now seen corresponding path program 1 times [2022-04-06 15:10:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:24,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902373188] [2022-04-06 15:10:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:24,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:24,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598151375] [2022-04-06 15:10:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:24,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:24,167 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:10:24,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 15:10:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 15:10:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:10:27,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:10:29,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902373188] [2022-04-06 15:10:29,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598151375] [2022-04-06 15:10:29,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598151375] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:29,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:29,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 36 [2022-04-06 15:10:30,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [434346910] [2022-04-06 15:10:30,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [434346910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:30,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:30,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 15:10:30,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687536607] [2022-04-06 15:10:30,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:30,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 15:10:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 15:10:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 15:10:30,163 INFO L87 Difference]: Start difference. First operand 521 states and 600 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:35,361 INFO L93 Difference]: Finished difference Result 615 states and 710 transitions. [2022-04-06 15:10:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 15:10:35,361 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 15:10:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:35,366 INFO L225 Difference]: With dead ends: 615 [2022-04-06 15:10:35,366 INFO L226 Difference]: Without dead ends: 609 [2022-04-06 15:10:35,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=104, Invalid=1618, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 15:10:35,370 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 108 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 3302 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:35,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 3302 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 15:10:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-04-06 15:10:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 537. [2022-04-06 15:10:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 453 states have (on average 1.1699779249448123) internal successors, (530), 503 states have internal predecessors, (530), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (60), 28 states have call predecessors, (60), 28 states have call successors, (60) [2022-04-06 15:10:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 620 transitions. [2022-04-06 15:10:35,636 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 620 transitions. Word has length 51 [2022-04-06 15:10:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:35,636 INFO L478 AbstractCegarLoop]: Abstraction has 537 states and 620 transitions. [2022-04-06 15:10:35,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 620 transitions. [2022-04-06 15:10:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 15:10:35,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:35,640 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:35,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 15:10:35,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:35,857 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 234775136, now seen corresponding path program 59 times [2022-04-06 15:10:35,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:35,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [343221919] [2022-04-06 15:10:35,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:10:35,976 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:10:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash 407892415, now seen corresponding path program 1 times [2022-04-06 15:10:35,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:35,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925232533] [2022-04-06 15:10:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:35,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:35,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:35,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916090434] [2022-04-06 15:10:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:35,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:35,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:35,982 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:10:35,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 15:10:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 15:10:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 15:10:38,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 15:10:41,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:41,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925232533] [2022-04-06 15:10:41,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:41,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916090434] [2022-04-06 15:10:41,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916090434] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:41,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:41,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2022-04-06 15:10:42,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:42,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [343221919] [2022-04-06 15:10:42,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [343221919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:42,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:42,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 15:10:42,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578421926] [2022-04-06 15:10:42,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:42,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 15:10:42,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:42,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 15:10:42,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1694, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 15:10:42,053 INFO L87 Difference]: Start difference. First operand 537 states and 620 transitions. Second operand has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:44,472 INFO L93 Difference]: Finished difference Result 555 states and 641 transitions. [2022-04-06 15:10:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 15:10:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 15:10:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:44,477 INFO L225 Difference]: With dead ends: 555 [2022-04-06 15:10:44,477 INFO L226 Difference]: Without dead ends: 549 [2022-04-06 15:10:44,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=136, Invalid=2120, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 15:10:44,481 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:44,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 473 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 15:10:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-04-06 15:10:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 547. [2022-04-06 15:10:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 460 states have (on average 1.1717391304347826) internal successors, (539), 512 states have internal predecessors, (539), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (63), 29 states have call predecessors, (63), 29 states have call successors, (63) [2022-04-06 15:10:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 633 transitions. [2022-04-06 15:10:44,769 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 633 transitions. Word has length 52 [2022-04-06 15:10:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:44,770 INFO L478 AbstractCegarLoop]: Abstraction has 547 states and 633 transitions. [2022-04-06 15:10:44,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 633 transitions. [2022-04-06 15:10:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 15:10:44,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:44,774 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:44,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 15:10:44,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 15:10:44,974 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash 141746317, now seen corresponding path program 60 times [2022-04-06 15:10:44,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:44,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123454819] [2022-04-06 15:10:45,095 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:10:45,095 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:10:45,095 INFO L85 PathProgramCache]: Analyzing trace with hash -334383188, now seen corresponding path program 1 times [2022-04-06 15:10:45,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:45,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567985949] [2022-04-06 15:10:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:45,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:45,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147591549] [2022-04-06 15:10:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:45,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:45,100 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:10:45,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 15:10:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:45,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 15:10:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 15:11:39,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 15:12:11,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567985949] [2022-04-06 15:12:11,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147591549] [2022-04-06 15:12:11,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147591549] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:11,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:11,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2022-04-06 15:12:25,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:25,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123454819] [2022-04-06 15:12:25,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123454819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:25,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:25,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:12:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525940959] [2022-04-06 15:12:25,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:25,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 15:12:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 15:12:25,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1862, Unknown=26, NotChecked=0, Total=2162 [2022-04-06 15:12:25,395 INFO L87 Difference]: Start difference. First operand 547 states and 633 transitions. Second operand has 28 states, 25 states have (on average 1.56) internal successors, (39), 27 states have internal predecessors, (39), 4 states have call successors, (5), 2 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 15:12:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:39,845 INFO L93 Difference]: Finished difference Result 558 states and 643 transitions. [2022-04-06 15:12:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 15:12:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.56) internal successors, (39), 27 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-04-06 15:12:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:39,848 INFO L225 Difference]: With dead ends: 558 [2022-04-06 15:12:39,848 INFO L226 Difference]: Without dead ends: 542 [2022-04-06 15:12:39,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 93.3s TimeCoverageRelationStatistics Valid=313, Invalid=2107, Unknown=30, NotChecked=0, Total=2450 [2022-04-06 15:12:39,851 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 47 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:39,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 840 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 299 Unchecked, 1.1s Time] [2022-04-06 15:12:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-04-06 15:12:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2022-04-06 15:12:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 453 states have (on average 1.1721854304635762) internal successors, (531), 505 states have internal predecessors, (531), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-04-06 15:12:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 619 transitions. [2022-04-06 15:12:40,139 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 619 transitions. Word has length 52 [2022-04-06 15:12:40,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:40,139 INFO L478 AbstractCegarLoop]: Abstraction has 540 states and 619 transitions. [2022-04-06 15:12:40,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.56) internal successors, (39), 27 states have internal predecessors, (39), 4 states have call successors, (5), 2 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 15:12:40,139 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 619 transitions. [2022-04-06 15:12:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 15:12:40,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:40,143 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:12:40,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:40,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 15:12:40,344 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:40,344 INFO L85 PathProgramCache]: Analyzing trace with hash 833777245, now seen corresponding path program 61 times [2022-04-06 15:12:40,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:40,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412322914] [2022-04-06 15:12:40,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:12:40,482 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:12:40,482 INFO L85 PathProgramCache]: Analyzing trace with hash -291599044, now seen corresponding path program 1 times [2022-04-06 15:12:40,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:40,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129401516] [2022-04-06 15:12:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:40,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:40,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:40,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226259783] [2022-04-06 15:12:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:40,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:40,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:40,487 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:40,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 15:12:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 15:12:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:12:43,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:12:46,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129401516] [2022-04-06 15:12:46,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226259783] [2022-04-06 15:12:46,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226259783] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:46,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:46,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 40 [2022-04-06 15:12:46,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:46,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412322914] [2022-04-06 15:12:46,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412322914] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:46,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:46,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 15:12:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169691038] [2022-04-06 15:12:46,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:46,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 15:12:46,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 15:12:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1540, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 15:12:46,376 INFO L87 Difference]: Start difference. First operand 540 states and 619 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:12:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:50,143 INFO L93 Difference]: Finished difference Result 546 states and 624 transitions. [2022-04-06 15:12:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 15:12:50,143 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 15:12:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:50,145 INFO L225 Difference]: With dead ends: 546 [2022-04-06 15:12:50,146 INFO L226 Difference]: Without dead ends: 526 [2022-04-06 15:12:50,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 15:12:50,149 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 59 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:50,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1655 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 15:12:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-04-06 15:12:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2022-04-06 15:12:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 442 states have (on average 1.1719457013574661) internal successors, (518), 492 states have internal predecessors, (518), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2022-04-06 15:12:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 603 transitions. [2022-04-06 15:12:50,422 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 603 transitions. Word has length 52 [2022-04-06 15:12:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:50,422 INFO L478 AbstractCegarLoop]: Abstraction has 526 states and 603 transitions. [2022-04-06 15:12:50,422 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:12:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 603 transitions. [2022-04-06 15:12:50,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 15:12:50,426 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:50,426 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:12:50,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:50,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 15:12:50,639 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1113039232, now seen corresponding path program 62 times [2022-04-06 15:12:50,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:50,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721569089] [2022-04-06 15:12:50,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:12:50,804 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:12:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1407304991, now seen corresponding path program 1 times [2022-04-06 15:12:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:50,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171735364] [2022-04-06 15:12:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:50,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:50,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:50,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215984667] [2022-04-06 15:12:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:50,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:50,809 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:50,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 15:12:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:50,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 15:12:50,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:12:54,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:12:56,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:56,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171735364] [2022-04-06 15:12:56,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:56,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215984667] [2022-04-06 15:12:56,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215984667] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:56,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:56,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 38 [2022-04-06 15:12:57,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:57,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721569089] [2022-04-06 15:12:57,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721569089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:57,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:57,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 15:12:57,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953480484] [2022-04-06 15:12:57,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:57,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 15:12:57,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 15:12:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1394, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 15:12:57,045 INFO L87 Difference]: Start difference. First operand 526 states and 603 transitions. Second operand has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:13:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:13:01,894 INFO L93 Difference]: Finished difference Result 532 states and 608 transitions. [2022-04-06 15:13:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 15:13:01,894 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 15:13:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:13:01,896 INFO L225 Difference]: With dead ends: 532 [2022-04-06 15:13:01,896 INFO L226 Difference]: Without dead ends: 514 [2022-04-06 15:13:01,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 15:13:01,900 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 95 mSDsluCounter, 2725 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 15:13:01,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 2833 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 15:13:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-04-06 15:13:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2022-04-06 15:13:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 433 states have (on average 1.1709006928406467) internal successors, (507), 481 states have internal predecessors, (507), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2022-04-06 15:13:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 589 transitions. [2022-04-06 15:13:02,166 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 589 transitions. Word has length 52 [2022-04-06 15:13:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:13:02,166 INFO L478 AbstractCegarLoop]: Abstraction has 514 states and 589 transitions. [2022-04-06 15:13:02,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:13:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 589 transitions. [2022-04-06 15:13:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 15:13:02,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:13:02,169 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:13:02,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 15:13:02,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 15:13:02,370 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:13:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:13:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2068699601, now seen corresponding path program 63 times [2022-04-06 15:13:02,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:13:02,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82491929] [2022-04-06 15:13:02,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:13:02,490 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:13:02,490 INFO L85 PathProgramCache]: Analyzing trace with hash -197602162, now seen corresponding path program 1 times [2022-04-06 15:13:02,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:13:02,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24211764] [2022-04-06 15:13:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:13:02,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:13:02,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:13:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323799439] [2022-04-06 15:13:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:13:02,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:13:02,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:13:02,495 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:13:02,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 15:13:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:02,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 15:13:02,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:13:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:13:09,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:13:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:13:20,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:13:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24211764] [2022-04-06 15:13:20,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:13:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323799439] [2022-04-06 15:13:20,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323799439] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:13:20,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:13:20,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2022-04-06 15:13:23,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:13:23,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82491929] [2022-04-06 15:13:23,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82491929] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:13:23,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:13:23,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:13:23,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624909156] [2022-04-06 15:13:23,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:13:23,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 15:13:23,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:13:23,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 15:13:23,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 15:13:23,154 INFO L87 Difference]: Start difference. First operand 514 states and 589 transitions. Second operand has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:13:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:13:33,154 INFO L93 Difference]: Finished difference Result 602 states and 697 transitions. [2022-04-06 15:13:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 15:13:33,157 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 15:13:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:13:33,165 INFO L225 Difference]: With dead ends: 602 [2022-04-06 15:13:33,165 INFO L226 Difference]: Without dead ends: 591 [2022-04-06 15:13:33,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=491, Invalid=3291, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 15:13:33,169 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 265 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:13:33,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1686 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 856 Invalid, 0 Unknown, 45 Unchecked, 3.7s Time] [2022-04-06 15:13:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-04-06 15:13:33,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 582. [2022-04-06 15:13:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 489 states have (on average 1.1697341513292434) internal successors, (572), 545 states have internal predecessors, (572), 33 states have call successors, (33), 5 states have call predecessors, (33), 59 states have return successors, (65), 31 states have call predecessors, (65), 31 states have call successors, (65) [2022-04-06 15:13:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 670 transitions. [2022-04-06 15:13:33,483 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 670 transitions. Word has length 52 [2022-04-06 15:13:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:13:33,484 INFO L478 AbstractCegarLoop]: Abstraction has 582 states and 670 transitions. [2022-04-06 15:13:33,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:13:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 670 transitions. [2022-04-06 15:13:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 15:13:33,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:13:33,498 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:13:33,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 15:13:33,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:13:33,711 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:13:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:13:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash 333057708, now seen corresponding path program 64 times [2022-04-06 15:13:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:13:33,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [959283777] [2022-04-06 15:13:33,842 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:13:33,842 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:13:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1554908363, now seen corresponding path program 1 times [2022-04-06 15:13:33,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:13:33,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019176861] [2022-04-06 15:13:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:13:33,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:13:33,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:13:33,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341654019] [2022-04-06 15:13:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:13:33,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:13:33,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:13:33,847 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:13:33,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 15:13:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:33,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 15:13:33,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:13:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:13:41,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:13:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 15:13:52,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:13:52,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019176861] [2022-04-06 15:13:52,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:13:52,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341654019] [2022-04-06 15:13:52,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341654019] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:13:52,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:13:52,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2022-04-06 15:13:56,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:13:56,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [959283777] [2022-04-06 15:13:56,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [959283777] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:13:56,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:13:56,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:13:56,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802152037] [2022-04-06 15:13:56,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:13:56,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 15:13:56,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:13:56,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 15:13:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 15:13:56,087 INFO L87 Difference]: Start difference. First operand 582 states and 670 transitions. Second operand has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:14:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:14:02,933 INFO L93 Difference]: Finished difference Result 597 states and 685 transitions. [2022-04-06 15:14:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 15:14:02,940 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 15:14:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:14:02,943 INFO L225 Difference]: With dead ends: 597 [2022-04-06 15:14:02,943 INFO L226 Difference]: Without dead ends: 585 [2022-04-06 15:14:02,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 15:14:02,948 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 100 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:14:02,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2465 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1372 Invalid, 0 Unknown, 1 Unchecked, 6.2s Time] [2022-04-06 15:14:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-04-06 15:14:03,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 583. [2022-04-06 15:14:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 490 states have (on average 1.1693877551020408) internal successors, (573), 546 states have internal predecessors, (573), 33 states have call successors, (33), 5 states have call predecessors, (33), 59 states have return successors, (60), 31 states have call predecessors, (60), 31 states have call successors, (60) [2022-04-06 15:14:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 666 transitions. [2022-04-06 15:14:03,275 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 666 transitions. Word has length 52 [2022-04-06 15:14:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:14:03,275 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 666 transitions. [2022-04-06 15:14:03,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:14:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 666 transitions. [2022-04-06 15:14:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 15:14:03,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:14:03,279 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:14:03,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 15:14:03,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:14:03,496 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:14:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:14:03,496 INFO L85 PathProgramCache]: Analyzing trace with hash 37231482, now seen corresponding path program 65 times [2022-04-06 15:14:03,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:03,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [546528833] [2022-04-06 15:14:03,611 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:14:03,611 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:14:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash 608082299, now seen corresponding path program 1 times [2022-04-06 15:14:03,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:14:03,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327844576] [2022-04-06 15:14:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:14:03,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:14:03,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:14:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315636897] [2022-04-06 15:14:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:14:03,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:14:03,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:14:03,617 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:14:03,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 15:14:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:14:03,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 15:14:03,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:14:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 15:14:04,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:14:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 15:14:05,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:14:05,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327844576] [2022-04-06 15:14:05,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:14:05,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315636897] [2022-04-06 15:14:05,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315636897] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:14:05,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:14:05,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2022-04-06 15:14:05,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:14:05,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [546528833] [2022-04-06 15:14:05,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [546528833] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:14:05,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:14:05,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 15:14:05,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109054552] [2022-04-06 15:14:05,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:14:05,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 15:14:05,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:05,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 15:14:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-04-06 15:14:05,882 INFO L87 Difference]: Start difference. First operand 583 states and 666 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:14:08,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:14:08,785 INFO L93 Difference]: Finished difference Result 735 states and 846 transitions. [2022-04-06 15:14:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 15:14:08,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-04-06 15:14:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:14:08,792 INFO L225 Difference]: With dead ends: 735 [2022-04-06 15:14:08,792 INFO L226 Difference]: Without dead ends: 693 [2022-04-06 15:14:08,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=513, Invalid=1379, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 15:14:08,798 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 93 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 15:14:08,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 392 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 15:14:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-04-06 15:14:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 666. [2022-04-06 15:14:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 573 states have (on average 1.162303664921466) internal successors, (666), 629 states have internal predecessors, (666), 33 states have call successors, (33), 5 states have call predecessors, (33), 59 states have return successors, (60), 31 states have call predecessors, (60), 31 states have call successors, (60) [2022-04-06 15:14:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 759 transitions. [2022-04-06 15:14:09,154 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 759 transitions. Word has length 53 [2022-04-06 15:14:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:14:09,154 INFO L478 AbstractCegarLoop]: Abstraction has 666 states and 759 transitions. [2022-04-06 15:14:09,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:14:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 759 transitions. [2022-04-06 15:14:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 15:14:09,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:14:09,159 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:14:09,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 15:14:09,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:14:09,359 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:14:09,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:14:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1234429601, now seen corresponding path program 66 times [2022-04-06 15:14:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:09,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1861576744] [2022-04-06 15:14:09,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:14:09,479 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:14:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash 684607392, now seen corresponding path program 1 times [2022-04-06 15:14:09,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:14:09,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275284374] [2022-04-06 15:14:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:14:09,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:14:09,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:14:09,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298628141] [2022-04-06 15:14:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:14:09,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:14:09,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:14:09,484 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:14:09,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 15:14:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:14:09,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 15:14:09,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:14:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:14:46,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:15:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 15:15:06,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:15:06,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275284374] [2022-04-06 15:15:06,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:15:06,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298628141] [2022-04-06 15:15:06,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298628141] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:15:06,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:15:06,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 21] total 50 [2022-04-06 15:15:13,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:15:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1861576744] [2022-04-06 15:15:13,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1861576744] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:15:13,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:15:13,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 15:15:13,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794002551] [2022-04-06 15:15:13,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:15:13,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 15:15:13,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:13,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 15:15:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2815, Unknown=5, NotChecked=0, Total=3192 [2022-04-06 15:15:13,125 INFO L87 Difference]: Start difference. First operand 666 states and 759 transitions. Second operand has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 4 states have call successors, (5), 2 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 15:15:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:15:17,449 INFO L93 Difference]: Finished difference Result 725 states and 833 transitions. [2022-04-06 15:15:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 15:15:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 53 [2022-04-06 15:15:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:15:17,463 INFO L225 Difference]: With dead ends: 725 [2022-04-06 15:15:17,463 INFO L226 Difference]: Without dead ends: 708 [2022-04-06 15:15:17,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=431, Invalid=3224, Unknown=5, NotChecked=0, Total=3660 [2022-04-06 15:15:17,469 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:15:17,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 863 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 708 Invalid, 0 Unknown, 202 Unchecked, 2.5s Time] [2022-04-06 15:15:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-04-06 15:15:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 658. [2022-04-06 15:15:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 565 states have (on average 1.1628318584070796) internal successors, (657), 621 states have internal predecessors, (657), 33 states have call successors, (33), 5 states have call predecessors, (33), 59 states have return successors, (60), 31 states have call predecessors, (60), 31 states have call successors, (60) [2022-04-06 15:15:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 750 transitions. [2022-04-06 15:15:17,831 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 750 transitions. Word has length 53 [2022-04-06 15:15:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:15:17,831 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 750 transitions. [2022-04-06 15:15:17,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 4 states have call successors, (5), 2 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 15:15:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 750 transitions.