/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/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:45:52,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:45:52,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:45:52,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 12:45:52,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:45:52,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:45:52,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:45:52,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 12:45:52,950 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:45:52,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:45:52,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:45:52,951 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 12:45:52,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:45:52,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 12:45:52,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:45:52,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:45:52,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:45:52,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:45:52,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 12:45:52,953 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 12:45:52,953 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 12:45:52,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:45:52,953 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 12:45:52,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:45:53,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:45:53,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:45:53,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:45:53,150 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:45:53,152 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:45:53,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2022-03-20 12:45:53,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02145ede/7b5c5b41f8824fdb80ec04949a59bef4/FLAGfee92387b [2022-03-20 12:45:53,491 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:45:53,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2022-03-20 12:45:53,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02145ede/7b5c5b41f8824fdb80ec04949a59bef4/FLAGfee92387b [2022-03-20 12:45:53,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02145ede/7b5c5b41f8824fdb80ec04949a59bef4 [2022-03-20 12:45:53,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:45:53,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 12:45:53,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:45:53,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:45:53,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:45:53,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:45:53" (1/1) ... [2022-03-20 12:45:53,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f4c9f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:53, skipping insertion in model container [2022-03-20 12:45:53,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:45:53" (1/1) ... [2022-03-20 12:45:53,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:45:53,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:45:54,068 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/eureka_01-2.c[323,336] [2022-03-20 12:45:54,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:45:54,097 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:45:54,105 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/eureka_01-2.c[323,336] [2022-03-20 12:45:54,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:45:54,133 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:45:54,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54 WrapperNode [2022-03-20 12:45:54,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:45:54,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:45:54,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:45:54,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:45:54,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54" (1/1) ... [2022-03-20 12:45:54,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54" (1/1) ... [2022-03-20 12:45:54,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54" (1/1) ... [2022-03-20 12:45:54,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54" (1/1) ... [2022-03-20 12:45:54,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54" (1/1) ... [2022-03-20 12:45:54,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54" (1/1) ... [2022-03-20 12:45:54,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54" (1/1) ... [2022-03-20 12:45:54,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:45:54,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:45:54,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:45:54,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:45:54,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54" (1/1) ... [2022-03-20 12:45:54,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:45:54,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:45:54,184 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) [2022-03-20 12:45:54,185 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 [2022-03-20 12:45:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:45:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:45:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:45:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 12:45:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:45:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:45:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:45:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:45:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:45:54,260 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:45:54,261 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:45:54,428 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:45:54,433 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:45:54,433 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-20 12:45:54,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:45:54 BoogieIcfgContainer [2022-03-20 12:45:54,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:45:54,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:45:54,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:45:54,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:45:54,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:45:53" (1/3) ... [2022-03-20 12:45:54,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa4b4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:45:54, skipping insertion in model container [2022-03-20 12:45:54,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:54" (2/3) ... [2022-03-20 12:45:54,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa4b4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:45:54, skipping insertion in model container [2022-03-20 12:45:54,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:45:54" (3/3) ... [2022-03-20 12:45:54,456 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2022-03-20 12:45:54,459 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:45:54,459 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:45:54,505 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:45:54,510 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 [2022-03-20 12:45:54,510 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:45:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 12:45:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 12:45:54,532 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:54,532 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:45:54,533 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1209894008, now seen corresponding path program 1 times [2022-03-20 12:45:54,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:54,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454743657] [2022-03-20 12:45:54,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:45:54,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1209894008, now seen corresponding path program 2 times [2022-03-20 12:45:54,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033515916] [2022-03-20 12:45:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:54,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:54,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:45:54,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:54,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033515916] [2022-03-20 12:45:54,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033515916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:54,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:54,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:45:54,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:54,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454743657] [2022-03-20 12:45:54,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454743657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:54,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:54,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:45:54,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340651465] [2022-03-20 12:45:54,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:54,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 12:45:54,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 12:45:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:45:54,835 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:54,883 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2022-03-20 12:45:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 12:45:54,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 12:45:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:54,892 INFO L225 Difference]: With dead ends: 61 [2022-03-20 12:45:54,892 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 12:45:54,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:45:54,901 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:54,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:45:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 12:45:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 12:45:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-03-20 12:45:54,928 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2022-03-20 12:45:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:54,928 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-03-20 12:45:54,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-03-20 12:45:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 12:45:54,929 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:54,929 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:45:54,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:45:54,930 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:54,930 INFO L85 PathProgramCache]: Analyzing trace with hash -286620772, now seen corresponding path program 1 times [2022-03-20 12:45:54,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:54,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1801068818] [2022-03-20 12:45:54,931 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:45:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash -286620772, now seen corresponding path program 2 times [2022-03-20 12:45:54,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:54,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979454258] [2022-03-20 12:45:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:45:55,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:55,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979454258] [2022-03-20 12:45:55,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979454258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:55,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:55,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:45:55,035 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:55,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1801068818] [2022-03-20 12:45:55,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1801068818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:55,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:55,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:45:55,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205097276] [2022-03-20 12:45:55,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:55,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:45:55,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:45:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:45:55,038 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:55,122 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-20 12:45:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:45:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 12:45:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:55,124 INFO L225 Difference]: With dead ends: 54 [2022-03-20 12:45:55,124 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 12:45:55,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:45:55,130 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:55,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 38 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:45:55,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 12:45:55,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-03-20 12:45:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-03-20 12:45:55,140 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2022-03-20 12:45:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:55,140 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-03-20 12:45:55,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-03-20 12:45:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:45:55,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:55,142 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] [2022-03-20 12:45:55,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:45:55,142 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:55,142 INFO L85 PathProgramCache]: Analyzing trace with hash -344225220, now seen corresponding path program 1 times [2022-03-20 12:45:55,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:55,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810420287] [2022-03-20 12:45:55,158 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:55,158 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:55,158 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash -344225220, now seen corresponding path program 2 times [2022-03-20 12:45:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:55,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213929438] [2022-03-20 12:45:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:55,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:45:55,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:55,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213929438] [2022-03-20 12:45:55,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213929438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:55,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:55,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:45:55,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:55,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810420287] [2022-03-20 12:45:55,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810420287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:55,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:55,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:45:55,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415895260] [2022-03-20 12:45:55,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:55,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:45:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:45:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:45:55,258 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:55,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:55,360 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-03-20 12:45:55,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:45:55,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 12:45:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:55,364 INFO L225 Difference]: With dead ends: 61 [2022-03-20 12:45:55,365 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 12:45:55,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 12:45:55,368 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:55,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:45:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 12:45:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2022-03-20 12:45:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-20 12:45:55,385 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2022-03-20 12:45:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:55,385 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-20 12:45:55,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-20 12:45:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:45:55,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:55,386 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] [2022-03-20 12:45:55,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 12:45:55,386 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash -522475142, now seen corresponding path program 1 times [2022-03-20 12:45:55,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:55,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [920945] [2022-03-20 12:45:55,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:55,388 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:55,388 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash -522475142, now seen corresponding path program 2 times [2022-03-20 12:45:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:55,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607296944] [2022-03-20 12:45:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:55,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:45:55,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607296944] [2022-03-20 12:45:55,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607296944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:55,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:55,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:45:55,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [920945] [2022-03-20 12:45:55,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [920945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:55,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:55,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:45:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412403517] [2022-03-20 12:45:55,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:55,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:45:55,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:55,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:45:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:45:55,464 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:55,555 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-03-20 12:45:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:45:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 12:45:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:55,556 INFO L225 Difference]: With dead ends: 55 [2022-03-20 12:45:55,557 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 12:45:55,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 12:45:55,560 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:55,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:45:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 12:45:55,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-20 12:45:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-03-20 12:45:55,578 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2022-03-20 12:45:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:55,578 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-03-20 12:45:55,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-03-20 12:45:55,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:45:55,580 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:55,583 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] [2022-03-20 12:45:55,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 12:45:55,583 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1086024003, now seen corresponding path program 1 times [2022-03-20 12:45:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:55,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931883762] [2022-03-20 12:45:55,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:55,589 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:55,589 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1086024003, now seen corresponding path program 2 times [2022-03-20 12:45:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:55,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941675463] [2022-03-20 12:45:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:55,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:55,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941675463] [2022-03-20 12:45:55,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941675463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:55,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:55,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:45:55,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:55,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931883762] [2022-03-20 12:45:55,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931883762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:55,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:55,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:45:55,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725878968] [2022-03-20 12:45:55,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:55,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:45:55,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:55,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:45:55,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:45:55,696 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:55,767 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-03-20 12:45:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:45:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 12:45:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:55,768 INFO L225 Difference]: With dead ends: 58 [2022-03-20 12:45:55,768 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 12:45:55,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 12:45:55,769 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:55,771 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 29 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:45:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 12:45:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2022-03-20 12:45:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-03-20 12:45:55,779 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2022-03-20 12:45:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:55,779 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-03-20 12:45:55,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-03-20 12:45:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 12:45:55,780 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:55,780 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] [2022-03-20 12:45:55,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 12:45:55,780 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash -669976079, now seen corresponding path program 1 times [2022-03-20 12:45:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:55,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1982204] [2022-03-20 12:45:55,781 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:55,782 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:55,782 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:55,783 INFO L85 PathProgramCache]: Analyzing trace with hash -669976079, now seen corresponding path program 2 times [2022-03-20 12:45:55,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:55,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355287707] [2022-03-20 12:45:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:55,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:55,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:55,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355287707] [2022-03-20 12:45:55,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355287707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:45:55,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861639059] [2022-03-20 12:45:55,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:45:55,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:55,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:45:55,887 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) [2022-03-20 12:45:55,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 12:45:55,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:45:55,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:45:55,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:45:55,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:45:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:56,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:45:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:56,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861639059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:45:56,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:45:56,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-20 12:45:56,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:56,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1982204] [2022-03-20 12:45:56,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1982204] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:56,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:56,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:45:56,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980979436] [2022-03-20 12:45:56,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:56,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:45:56,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:56,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:45:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-20 12:45:56,212 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:56,278 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-03-20 12:45:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:45:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 12:45:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:56,281 INFO L225 Difference]: With dead ends: 63 [2022-03-20 12:45:56,281 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 12:45:56,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-20 12:45:56,282 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:56,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 38 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:45:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 12:45:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-03-20 12:45:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-03-20 12:45:56,291 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2022-03-20 12:45:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:56,291 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-03-20 12:45:56,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-03-20 12:45:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 12:45:56,292 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:56,292 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] [2022-03-20 12:45:56,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 12:45:56,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-20 12:45:56,508 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1490218863, now seen corresponding path program 3 times [2022-03-20 12:45:56,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:56,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368885945] [2022-03-20 12:45:56,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:56,509 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:56,510 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:56,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1490218863, now seen corresponding path program 4 times [2022-03-20 12:45:56,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:56,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118437709] [2022-03-20 12:45:56,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:56,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:56,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:56,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:56,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118437709] [2022-03-20 12:45:56,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118437709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:45:56,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207474172] [2022-03-20 12:45:56,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:45:56,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:56,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:45:56,565 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) [2022-03-20 12:45:56,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 12:45:56,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:45:56,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:45:56,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 12:45:56,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:45:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:56,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 12:45:56,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207474172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:56,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 12:45:56,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-20 12:45:56,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:56,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368885945] [2022-03-20 12:45:56,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368885945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:56,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:56,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:45:56,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362068306] [2022-03-20 12:45:56,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:56,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:45:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:45:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 12:45:56,668 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:56,694 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-03-20 12:45:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:45:56,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 12:45:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:56,695 INFO L225 Difference]: With dead ends: 65 [2022-03-20 12:45:56,695 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 12:45:56,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 12:45:56,700 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:56,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:45:56,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 12:45:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-20 12:45:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-03-20 12:45:56,710 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2022-03-20 12:45:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:56,710 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-03-20 12:45:56,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-03-20 12:45:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 12:45:56,712 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:56,712 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] [2022-03-20 12:45:56,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 12:45:56,935 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,SelfDestructingSolverStorable6 [2022-03-20 12:45:56,935 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1271364145, now seen corresponding path program 1 times [2022-03-20 12:45:56,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1579653423] [2022-03-20 12:45:56,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:56,938 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:56,938 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1271364145, now seen corresponding path program 2 times [2022-03-20 12:45:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:56,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113276512] [2022-03-20 12:45:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:56,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:56,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:56,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:56,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113276512] [2022-03-20 12:45:56,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113276512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:45:56,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395314136] [2022-03-20 12:45:56,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:45:56,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:56,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:45:56,997 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) [2022-03-20 12:45:56,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 12:45:57,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:45:57,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:45:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 12:45:57,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:45:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:57,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:45:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:57,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395314136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:45:57,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:45:57,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-20 12:45:57,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:57,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1579653423] [2022-03-20 12:45:57,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1579653423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:57,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:57,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:45:57,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395173163] [2022-03-20 12:45:57,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:57,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:45:57,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:57,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:45:57,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:45:57,222 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:57,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:57,312 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-03-20 12:45:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:45:57,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 12:45:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:57,313 INFO L225 Difference]: With dead ends: 66 [2022-03-20 12:45:57,314 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 12:45:57,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2022-03-20 12:45:57,314 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:57,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 43 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:45:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 12:45:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-03-20 12:45:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-03-20 12:45:57,328 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 32 [2022-03-20 12:45:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:57,328 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-03-20 12:45:57,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-03-20 12:45:57,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 12:45:57,332 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:57,332 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] [2022-03-20 12:45:57,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 12:45:57,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:57,550 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:57,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:57,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320561, now seen corresponding path program 3 times [2022-03-20 12:45:57,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:57,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1164112381] [2022-03-20 12:45:57,551 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:57,552 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:57,552 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:57,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320561, now seen corresponding path program 4 times [2022-03-20 12:45:57,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:57,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137690397] [2022-03-20 12:45:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:57,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:57,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:57,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137690397] [2022-03-20 12:45:57,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137690397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:45:57,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034018434] [2022-03-20 12:45:57,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:45:57,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:57,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:45:57,629 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) [2022-03-20 12:45:57,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 12:45:57,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:45:57,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:45:57,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:45:57,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:45:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 12:45:57,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:45:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 12:45:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034018434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:45:57,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:45:57,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-20 12:45:57,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:57,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1164112381] [2022-03-20 12:45:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1164112381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:57,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:57,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:45:57,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509054888] [2022-03-20 12:45:57,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:57,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:45:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:45:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-20 12:45:57,863 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:57,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:57,955 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-03-20 12:45:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:45:57,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 12:45:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:57,956 INFO L225 Difference]: With dead ends: 69 [2022-03-20 12:45:57,956 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 12:45:57,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-03-20 12:45:57,957 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:57,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 48 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:45:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 12:45:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-03-20 12:45:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-03-20 12:45:57,961 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 35 [2022-03-20 12:45:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:57,962 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-03-20 12:45:57,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-03-20 12:45:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 12:45:57,962 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:57,962 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] [2022-03-20 12:45:57,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 12:45:58,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:58,175 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 385921679, now seen corresponding path program 5 times [2022-03-20 12:45:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:58,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [848553310] [2022-03-20 12:45:58,177 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:58,177 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:58,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 385921679, now seen corresponding path program 6 times [2022-03-20 12:45:58,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:58,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427290099] [2022-03-20 12:45:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:58,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:58,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:45:58,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427290099] [2022-03-20 12:45:58,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427290099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:45:58,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275321475] [2022-03-20 12:45:58,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:45:58,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:58,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:45:58,258 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) [2022-03-20 12:45:58,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 12:45:58,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:45:58,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:45:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:45:58,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:45:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 12:45:58,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:45:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 12:45:58,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275321475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:45:58,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:45:58,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-20 12:45:58,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:58,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [848553310] [2022-03-20 12:45:58,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [848553310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:58,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:58,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:45:58,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414868004] [2022-03-20 12:45:58,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:58,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:45:58,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:45:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-03-20 12:45:58,490 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:58,590 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-03-20 12:45:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:45:58,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-20 12:45:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:58,591 INFO L225 Difference]: With dead ends: 72 [2022-03-20 12:45:58,591 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 12:45:58,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2022-03-20 12:45:58,592 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:58,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:45:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 12:45:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-03-20 12:45:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-03-20 12:45:58,597 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 38 [2022-03-20 12:45:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:58,597 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-03-20 12:45:58,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-03-20 12:45:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 12:45:58,598 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:58,598 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] [2022-03-20 12:45:58,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 12:45:58,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 12:45:58,815 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1361731471, now seen corresponding path program 7 times [2022-03-20 12:45:58,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:58,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [88086805] [2022-03-20 12:45:58,817 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:58,817 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:58,817 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1361731471, now seen corresponding path program 8 times [2022-03-20 12:45:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:58,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186920613] [2022-03-20 12:45:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:58,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:58,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:45:58,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:58,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186920613] [2022-03-20 12:45:58,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186920613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:45:58,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251725459] [2022-03-20 12:45:58,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:45:58,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:58,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:45:58,859 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) [2022-03-20 12:45:58,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 12:45:58,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:45:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:45:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:45:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:45:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-20 12:45:59,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:45:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-20 12:45:59,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251725459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:45:59,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:45:59,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-20 12:45:59,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:59,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [88086805] [2022-03-20 12:45:59,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [88086805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:59,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:59,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:45:59,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232127605] [2022-03-20 12:45:59,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:59,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:45:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:45:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-20 12:45:59,112 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:59,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:59,185 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-03-20 12:45:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:45:59,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-20 12:45:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:59,186 INFO L225 Difference]: With dead ends: 73 [2022-03-20 12:45:59,186 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 12:45:59,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-20 12:45:59,187 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:59,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 45 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:45:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 12:45:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-03-20 12:45:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-03-20 12:45:59,192 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 41 [2022-03-20 12:45:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:59,192 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-03-20 12:45:59,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-03-20 12:45:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 12:45:59,192 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:59,192 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-03-20 12:45:59,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 12:45:59,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:59,397 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1307195270, now seen corresponding path program 9 times [2022-03-20 12:45:59,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:59,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546882141] [2022-03-20 12:45:59,398 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:59,398 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:59,399 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1307195270, now seen corresponding path program 10 times [2022-03-20 12:45:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:59,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641191237] [2022-03-20 12:45:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:59,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:45:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641191237] [2022-03-20 12:45:59,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641191237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:45:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730164776] [2022-03-20 12:45:59,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:45:59,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:45:59,443 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) [2022-03-20 12:45:59,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 12:45:59,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:45:59,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:45:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:45:59,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:45:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:45:59,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:45:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:45:59,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730164776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:45:59,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:45:59,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-20 12:45:59,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:45:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546882141] [2022-03-20 12:45:59,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546882141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:45:59,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:45:59,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:45:59,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434064253] [2022-03-20 12:45:59,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:45:59,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:45:59,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:59,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:45:59,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 12:45:59,639 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:59,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:45:59,723 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-20 12:45:59,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:45:59,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-20 12:45:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:45:59,723 INFO L225 Difference]: With dead ends: 79 [2022-03-20 12:45:59,723 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 12:45:59,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:45:59,724 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:45:59,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 45 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:45:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 12:45:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-20 12:45:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:45:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-20 12:45:59,730 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 44 [2022-03-20 12:45:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:45:59,730 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-20 12:45:59,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:45:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-20 12:45:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 12:45:59,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:45:59,730 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-03-20 12:45:59,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 12:45:59,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:59,940 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:45:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:45:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash -116869167, now seen corresponding path program 11 times [2022-03-20 12:45:59,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:45:59,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [944175204] [2022-03-20 12:45:59,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:45:59,941 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:45:59,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:45:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash -116869167, now seen corresponding path program 12 times [2022-03-20 12:45:59,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:45:59,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632171794] [2022-03-20 12:45:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:45:59,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:45:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:59,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:45:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:45:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:45:59,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:45:59,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632171794] [2022-03-20 12:45:59,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632171794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:45:59,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436501909] [2022-03-20 12:45:59,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:45:59,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:45:59,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:45:59,990 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) [2022-03-20 12:45:59,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 12:46:00,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:00,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:00,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:46:00,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 12:46:00,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 12:46:00,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436501909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:00,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:00,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-20 12:46:00,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:00,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [944175204] [2022-03-20 12:46:00,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [944175204] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:00,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:00,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:46:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281366433] [2022-03-20 12:46:00,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:00,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:46:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:46:00,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 12:46:00,258 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:00,355 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-03-20 12:46:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:46:00,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-20 12:46:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:00,356 INFO L225 Difference]: With dead ends: 85 [2022-03-20 12:46:00,356 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 12:46:00,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-03-20 12:46:00,357 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:00,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 45 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:46:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 12:46:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-03-20 12:46:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-03-20 12:46:00,362 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 47 [2022-03-20 12:46:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:00,362 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-03-20 12:46:00,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-03-20 12:46:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 12:46:00,363 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:00,363 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-03-20 12:46:00,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:00,571 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,SelfDestructingSolverStorable12 [2022-03-20 12:46:00,572 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1638069530, now seen corresponding path program 13 times [2022-03-20 12:46:00,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:00,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [238900363] [2022-03-20 12:46:00,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:00,573 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:00,573 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1638069530, now seen corresponding path program 14 times [2022-03-20 12:46:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:00,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714086590] [2022-03-20 12:46:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:00,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:00,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:00,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714086590] [2022-03-20 12:46:00,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714086590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319839305] [2022-03-20 12:46:00,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:00,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:00,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:00,656 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) [2022-03-20 12:46:00,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 12:46:00,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:00,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:00,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:00,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:00,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:00,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319839305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:00,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:00,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-20 12:46:00,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:00,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [238900363] [2022-03-20 12:46:00,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [238900363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:00,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:00,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:46:00,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609946153] [2022-03-20 12:46:00,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:00,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:46:00,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:00,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:46:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-03-20 12:46:00,950 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:01,070 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-20 12:46:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:46:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-20 12:46:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:01,072 INFO L225 Difference]: With dead ends: 91 [2022-03-20 12:46:01,072 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 12:46:01,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:46:01,073 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:01,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 50 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 12:46:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-03-20 12:46:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2022-03-20 12:46:01,078 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 50 [2022-03-20 12:46:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:01,079 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2022-03-20 12:46:01,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2022-03-20 12:46:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 12:46:01,079 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:01,079 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2022-03-20 12:46:01,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:01,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 12:46:01,296 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash 379897649, now seen corresponding path program 15 times [2022-03-20 12:46:01,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:01,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369347012] [2022-03-20 12:46:01,297 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:01,297 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:01,297 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash 379897649, now seen corresponding path program 16 times [2022-03-20 12:46:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561229202] [2022-03-20 12:46:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:01,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:01,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:01,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:01,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561229202] [2022-03-20 12:46:01,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561229202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:01,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508330766] [2022-03-20 12:46:01,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:01,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:01,355 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) [2022-03-20 12:46:01,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 12:46:01,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:01,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:01,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 12:46:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:01,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:01,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508330766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:01,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:01,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-20 12:46:01,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:01,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369347012] [2022-03-20 12:46:01,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369347012] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:01,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:01,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:46:01,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410101144] [2022-03-20 12:46:01,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:01,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:46:01,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:46:01,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:46:01,649 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:01,835 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-03-20 12:46:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 12:46:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 12:46:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:01,836 INFO L225 Difference]: With dead ends: 97 [2022-03-20 12:46:01,836 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 12:46:01,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-03-20 12:46:01,837 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:01,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 60 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 12:46:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-03-20 12:46:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-03-20 12:46:01,843 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 53 [2022-03-20 12:46:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:01,843 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-03-20 12:46:01,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-03-20 12:46:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 12:46:01,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:01,843 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-20 12:46:01,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:02,058 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,SelfDestructingSolverStorable14 [2022-03-20 12:46:02,058 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:02,058 INFO L85 PathProgramCache]: Analyzing trace with hash 360982970, now seen corresponding path program 17 times [2022-03-20 12:46:02,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:02,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386942231] [2022-03-20 12:46:02,060 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:02,060 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:02,060 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash 360982970, now seen corresponding path program 18 times [2022-03-20 12:46:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:02,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408935767] [2022-03-20 12:46:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:02,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:02,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:02,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408935767] [2022-03-20 12:46:02,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408935767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:02,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208167490] [2022-03-20 12:46:02,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:02,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:02,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:02,129 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) [2022-03-20 12:46:02,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 12:46:02,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:02,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:02,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:46:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-20 12:46:02,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-20 12:46:02,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208167490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:02,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:02,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2022-03-20 12:46:02,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:02,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386942231] [2022-03-20 12:46:02,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386942231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:02,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:02,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 12:46:02,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330869099] [2022-03-20 12:46:02,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:02,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 12:46:02,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:02,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 12:46:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-20 12:46:02,427 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:02,572 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-03-20 12:46:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:46:02,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-20 12:46:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:02,573 INFO L225 Difference]: With dead ends: 103 [2022-03-20 12:46:02,573 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 12:46:02,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:46:02,573 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:02,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 45 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 12:46:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 12:46:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-03-20 12:46:02,579 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 56 [2022-03-20 12:46:02,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:02,579 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-03-20 12:46:02,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-03-20 12:46:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 12:46:02,580 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:02,580 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2022-03-20 12:46:02,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:02,797 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,SelfDestructingSolverStorable15 [2022-03-20 12:46:02,797 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash -485503343, now seen corresponding path program 19 times [2022-03-20 12:46:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:02,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [951601801] [2022-03-20 12:46:02,798 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:02,798 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:02,798 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash -485503343, now seen corresponding path program 20 times [2022-03-20 12:46:02,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:02,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128932536] [2022-03-20 12:46:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:02,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:02,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128932536] [2022-03-20 12:46:02,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128932536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694950662] [2022-03-20 12:46:02,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:02,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:02,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:02,876 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) [2022-03-20 12:46:02,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 12:46:02,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:02,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 12:46:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:03,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:03,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694950662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:03,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:03,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-03-20 12:46:03,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:03,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [951601801] [2022-03-20 12:46:03,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [951601801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:03,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:03,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:46:03,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678524938] [2022-03-20 12:46:03,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:03,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:46:03,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:03,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:46:03,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=483, Unknown=0, NotChecked=0, Total=812 [2022-03-20 12:46:03,317 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:03,502 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-03-20 12:46:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:46:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-20 12:46:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:03,503 INFO L225 Difference]: With dead ends: 109 [2022-03-20 12:46:03,503 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 12:46:03,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=518, Invalid=888, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 12:46:03,504 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 125 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:03,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 45 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 12:46:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-03-20 12:46:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-03-20 12:46:03,511 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2022-03-20 12:46:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:03,511 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-03-20 12:46:03,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-03-20 12:46:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 12:46:03,518 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:03,518 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2022-03-20 12:46:03,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:03,728 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,SelfDestructingSolverStorable16 [2022-03-20 12:46:03,728 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1888708186, now seen corresponding path program 21 times [2022-03-20 12:46:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:03,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [993347144] [2022-03-20 12:46:03,730 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:03,730 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:03,730 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1888708186, now seen corresponding path program 22 times [2022-03-20 12:46:03,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:03,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873370228] [2022-03-20 12:46:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:03,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:03,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:03,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873370228] [2022-03-20 12:46:03,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873370228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:03,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703307849] [2022-03-20 12:46:03,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:03,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:03,827 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) [2022-03-20 12:46:03,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 12:46:03,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:03,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:03,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 12:46:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 71 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:04,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 71 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:04,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703307849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:04,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:04,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-20 12:46:04,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:04,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [993347144] [2022-03-20 12:46:04,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [993347144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:04,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:04,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 12:46:04,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372432543] [2022-03-20 12:46:04,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:04,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 12:46:04,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 12:46:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 12:46:04,269 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:04,501 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-03-20 12:46:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:46:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 12:46:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:04,502 INFO L225 Difference]: With dead ends: 115 [2022-03-20 12:46:04,502 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 12:46:04,503 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 12:46:04,503 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 137 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:04,503 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 50 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 12:46:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-03-20 12:46:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.234375) internal successors, (79), 64 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-03-20 12:46:04,510 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 62 [2022-03-20 12:46:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:04,511 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-03-20 12:46:04,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-03-20 12:46:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 12:46:04,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:04,511 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2022-03-20 12:46:04,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:04,727 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,SelfDestructingSolverStorable17 [2022-03-20 12:46:04,727 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:04,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1792029199, now seen corresponding path program 23 times [2022-03-20 12:46:04,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:04,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1834427951] [2022-03-20 12:46:04,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:04,729 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:04,729 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1792029199, now seen corresponding path program 24 times [2022-03-20 12:46:04,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:04,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766761830] [2022-03-20 12:46:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:04,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:04,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:04,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:04,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766761830] [2022-03-20 12:46:04,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766761830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:04,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408172535] [2022-03-20 12:46:04,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:04,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:04,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:04,847 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) [2022-03-20 12:46:04,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 12:46:04,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:04,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:04,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:46:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-20 12:46:05,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-20 12:46:05,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408172535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:05,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:05,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-03-20 12:46:05,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:05,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1834427951] [2022-03-20 12:46:05,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1834427951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:05,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:05,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 12:46:05,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962867933] [2022-03-20 12:46:05,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:05,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 12:46:05,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:05,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 12:46:05,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-20 12:46:05,241 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:05,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:05,478 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2022-03-20 12:46:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 12:46:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-20 12:46:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:05,479 INFO L225 Difference]: With dead ends: 121 [2022-03-20 12:46:05,479 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 12:46:05,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2022-03-20 12:46:05,479 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:05,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 55 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 12:46:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-03-20 12:46:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 67 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-20 12:46:05,487 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2022-03-20 12:46:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:05,488 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-20 12:46:05,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-20 12:46:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 12:46:05,488 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:05,488 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2022-03-20 12:46:05,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:05,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:05,689 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:05,689 INFO L85 PathProgramCache]: Analyzing trace with hash 170568442, now seen corresponding path program 25 times [2022-03-20 12:46:05,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:05,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [411795070] [2022-03-20 12:46:05,690 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:05,690 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:05,690 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash 170568442, now seen corresponding path program 26 times [2022-03-20 12:46:05,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:05,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847841351] [2022-03-20 12:46:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:05,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:05,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:05,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847841351] [2022-03-20 12:46:05,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847841351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:05,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187194004] [2022-03-20 12:46:05,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:05,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:05,809 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) [2022-03-20 12:46:05,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 12:46:05,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:05,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 12:46:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:06,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:06,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187194004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:06,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:06,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-03-20 12:46:06,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [411795070] [2022-03-20 12:46:06,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [411795070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:06,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:06,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:46:06,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774540032] [2022-03-20 12:46:06,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:06,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:46:06,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:46:06,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=746, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 12:46:06,404 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:06,660 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2022-03-20 12:46:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:46:06,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 12:46:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:06,661 INFO L225 Difference]: With dead ends: 127 [2022-03-20 12:46:06,661 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 12:46:06,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=816, Invalid=1440, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 12:46:06,663 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:06,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 45 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 12:46:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-20 12:46:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-03-20 12:46:06,680 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 68 [2022-03-20 12:46:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:06,681 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-03-20 12:46:06,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:06,681 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-03-20 12:46:06,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 12:46:06,681 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:06,681 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 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] [2022-03-20 12:46:06,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:06,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:06,886 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash 527091025, now seen corresponding path program 27 times [2022-03-20 12:46:06,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:06,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020849789] [2022-03-20 12:46:06,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:06,889 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:06,889 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:06,889 INFO L85 PathProgramCache]: Analyzing trace with hash 527091025, now seen corresponding path program 28 times [2022-03-20 12:46:06,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:06,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4315050] [2022-03-20 12:46:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:06,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:07,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:07,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4315050] [2022-03-20 12:46:07,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4315050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146345940] [2022-03-20 12:46:07,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:07,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:07,022 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) [2022-03-20 12:46:07,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 12:46:07,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:07,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:07,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 12:46:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 146 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:07,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 146 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:07,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146345940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:07,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:07,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-20 12:46:07,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:07,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020849789] [2022-03-20 12:46:07,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020849789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:07,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:07,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:46:07,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079235299] [2022-03-20 12:46:07,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:07,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:46:07,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:46:07,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1359, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 12:46:07,583 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:07,890 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2022-03-20 12:46:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 12:46:07,890 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-20 12:46:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:07,890 INFO L225 Difference]: With dead ends: 133 [2022-03-20 12:46:07,890 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 12:46:07,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=607, Invalid=2363, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 12:46:07,892 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:07,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 50 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 12:46:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-20 12:46:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-03-20 12:46:07,901 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 71 [2022-03-20 12:46:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:07,901 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-03-20 12:46:07,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-03-20 12:46:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 12:46:07,902 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:07,902 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 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] [2022-03-20 12:46:07,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:08,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:08,104 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:08,104 INFO L85 PathProgramCache]: Analyzing trace with hash 237238170, now seen corresponding path program 29 times [2022-03-20 12:46:08,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2127639897] [2022-03-20 12:46:08,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:08,106 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:08,106 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash 237238170, now seen corresponding path program 30 times [2022-03-20 12:46:08,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:08,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874522198] [2022-03-20 12:46:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:08,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:08,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:08,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:08,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874522198] [2022-03-20 12:46:08,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874522198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21690617] [2022-03-20 12:46:08,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:08,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:08,278 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) [2022-03-20 12:46:08,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 12:46:08,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:46:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-20 12:46:08,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-20 12:46:08,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21690617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:08,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:08,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-03-20 12:46:08,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:08,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2127639897] [2022-03-20 12:46:08,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2127639897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:08,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:08,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 12:46:08,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091723823] [2022-03-20 12:46:08,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:08,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 12:46:08,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:08,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 12:46:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2022-03-20 12:46:08,628 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:08,914 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2022-03-20 12:46:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 12:46:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-20 12:46:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:08,916 INFO L225 Difference]: With dead ends: 139 [2022-03-20 12:46:08,916 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 12:46:08,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 12:46:08,917 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:08,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 55 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 12:46:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-03-20 12:46:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.25) internal successors, (95), 76 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2022-03-20 12:46:08,927 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 74 [2022-03-20 12:46:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:08,927 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2022-03-20 12:46:08,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2022-03-20 12:46:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 12:46:08,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:08,927 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 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] [2022-03-20 12:46:08,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:09,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:09,136 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:09,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1884900175, now seen corresponding path program 31 times [2022-03-20 12:46:09,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:09,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1278547490] [2022-03-20 12:46:09,137 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:09,137 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:09,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1884900175, now seen corresponding path program 32 times [2022-03-20 12:46:09,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:09,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987393184] [2022-03-20 12:46:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:09,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:09,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:09,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:09,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987393184] [2022-03-20 12:46:09,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987393184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:09,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791436850] [2022-03-20 12:46:09,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:09,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:09,330 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) [2022-03-20 12:46:09,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 12:46:09,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:09,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:46:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:09,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:09,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791436850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:09,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:09,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2022-03-20 12:46:09,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1278547490] [2022-03-20 12:46:09,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1278547490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:09,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:09,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 12:46:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260357089] [2022-03-20 12:46:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:09,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 12:46:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 12:46:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=893, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 12:46:09,978 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:10,297 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2022-03-20 12:46:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 12:46:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-20 12:46:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:10,297 INFO L225 Difference]: With dead ends: 145 [2022-03-20 12:46:10,297 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 12:46:10,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=972, Invalid=1890, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 12:46:10,299 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 193 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:10,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 12:46:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-03-20 12:46:10,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-03-20 12:46:10,309 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 77 [2022-03-20 12:46:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:10,309 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-03-20 12:46:10,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-03-20 12:46:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 12:46:10,310 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:10,310 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2022-03-20 12:46:10,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:10,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:10,511 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash -589738950, now seen corresponding path program 33 times [2022-03-20 12:46:10,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:10,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765849205] [2022-03-20 12:46:10,512 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:10,512 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:10,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -589738950, now seen corresponding path program 34 times [2022-03-20 12:46:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:10,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147291045] [2022-03-20 12:46:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:10,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:10,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147291045] [2022-03-20 12:46:10,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147291045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171457511] [2022-03-20 12:46:10,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:10,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:10,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:10,713 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) [2022-03-20 12:46:10,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 12:46:10,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:10,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:46:10,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 248 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:11,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 248 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:11,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171457511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:11,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:11,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 51 [2022-03-20 12:46:11,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:11,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [765849205] [2022-03-20 12:46:11,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [765849205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:11,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:11,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 12:46:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408580056] [2022-03-20 12:46:11,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:11,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 12:46:11,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:11,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 12:46:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1950, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 12:46:11,338 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:11,700 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2022-03-20 12:46:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 12:46:11,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-20 12:46:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:11,704 INFO L225 Difference]: With dead ends: 151 [2022-03-20 12:46:11,704 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 12:46:11,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=949, Invalid=3473, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 12:46:11,706 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:11,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 40 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 12:46:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-20 12:46:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 82 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-03-20 12:46:11,717 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 80 [2022-03-20 12:46:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:11,717 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-03-20 12:46:11,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-03-20 12:46:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 12:46:11,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:11,717 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 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] [2022-03-20 12:46:11,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:11,921 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:11,922 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:11,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1867095057, now seen corresponding path program 35 times [2022-03-20 12:46:11,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:11,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1225830560] [2022-03-20 12:46:11,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:11,923 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:11,923 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:11,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1867095057, now seen corresponding path program 36 times [2022-03-20 12:46:11,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:11,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114136767] [2022-03-20 12:46:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:11,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:12,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:12,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:12,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114136767] [2022-03-20 12:46:12,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114136767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:12,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038131973] [2022-03-20 12:46:12,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:12,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:12,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:12,119 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) [2022-03-20 12:46:12,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 12:46:12,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:12,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:12,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:46:12,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 12:46:12,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 12:46:12,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038131973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:12,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:12,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5, 5] total 26 [2022-03-20 12:46:12,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1225830560] [2022-03-20 12:46:12,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1225830560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:12,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:12,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 12:46:12,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498624648] [2022-03-20 12:46:12,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:12,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 12:46:12,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 12:46:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:46:12,631 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:12,963 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2022-03-20 12:46:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 12:46:12,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 12:46:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:12,964 INFO L225 Difference]: With dead ends: 157 [2022-03-20 12:46:12,965 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 12:46:12,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=521, Invalid=1285, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 12:46:12,966 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:12,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 45 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 12:46:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2022-03-20 12:46:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 85 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-03-20 12:46:12,978 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 83 [2022-03-20 12:46:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:12,978 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-03-20 12:46:12,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-03-20 12:46:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 12:46:12,978 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:12,978 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 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] [2022-03-20 12:46:12,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:13,185 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,SelfDestructingSolverStorable24 [2022-03-20 12:46:13,185 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1423660838, now seen corresponding path program 37 times [2022-03-20 12:46:13,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:13,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633138081] [2022-03-20 12:46:13,187 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:13,187 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:13,187 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1423660838, now seen corresponding path program 38 times [2022-03-20 12:46:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:13,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348034311] [2022-03-20 12:46:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:13,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:13,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:13,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348034311] [2022-03-20 12:46:13,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348034311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:13,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402476756] [2022-03-20 12:46:13,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:13,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:13,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:13,374 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) [2022-03-20 12:46:13,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 12:46:13,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:13,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 12:46:13,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:13,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402476756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:14,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:14,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 42 [2022-03-20 12:46:14,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [633138081] [2022-03-20 12:46:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [633138081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:14,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:14,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 12:46:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115822899] [2022-03-20 12:46:14,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:14,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 12:46:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 12:46:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=1058, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 12:46:14,084 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:14,463 INFO L93 Difference]: Finished difference Result 163 states and 206 transitions. [2022-03-20 12:46:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 12:46:14,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-20 12:46:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:14,464 INFO L225 Difference]: With dead ends: 163 [2022-03-20 12:46:14,464 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 12:46:14,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1128, Invalid=2412, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 12:46:14,465 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 225 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:14,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 50 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 12:46:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-03-20 12:46:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 88 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-03-20 12:46:14,477 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 86 [2022-03-20 12:46:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:14,477 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-03-20 12:46:14,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-03-20 12:46:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 12:46:14,478 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:14,478 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 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] [2022-03-20 12:46:14,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:14,691 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,SelfDestructingSolverStorable25 [2022-03-20 12:46:14,691 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash 590969713, now seen corresponding path program 39 times [2022-03-20 12:46:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [702430892] [2022-03-20 12:46:14,693 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:14,693 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:14,693 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash 590969713, now seen corresponding path program 40 times [2022-03-20 12:46:14,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:14,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948186484] [2022-03-20 12:46:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:14,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:14,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:14,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:14,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948186484] [2022-03-20 12:46:14,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948186484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:14,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163009567] [2022-03-20 12:46:14,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:14,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:14,930 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) [2022-03-20 12:46:14,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 12:46:15,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:15,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:15,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 12:46:15,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 377 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:15,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 377 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:15,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163009567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:15,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:15,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 60 [2022-03-20 12:46:15,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [702430892] [2022-03-20 12:46:15,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [702430892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:15,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:15,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 12:46:15,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63141144] [2022-03-20 12:46:15,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:15,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 12:46:15,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 12:46:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=2691, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 12:46:15,603 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:16,078 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2022-03-20 12:46:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 12:46:16,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-20 12:46:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:16,080 INFO L225 Difference]: With dead ends: 169 [2022-03-20 12:46:16,080 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 12:46:16,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1321, Invalid=4841, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 12:46:16,082 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:16,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 50 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 12:46:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-03-20 12:46:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.2637362637362637) internal successors, (115), 91 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2022-03-20 12:46:16,098 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 89 [2022-03-20 12:46:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:16,098 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2022-03-20 12:46:16,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2022-03-20 12:46:16,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 12:46:16,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:16,099 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 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] [2022-03-20 12:46:16,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:16,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 12:46:16,299 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash 576720250, now seen corresponding path program 41 times [2022-03-20 12:46:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:16,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [694881341] [2022-03-20 12:46:16,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:16,301 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:16,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:16,301 INFO L85 PathProgramCache]: Analyzing trace with hash 576720250, now seen corresponding path program 42 times [2022-03-20 12:46:16,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:16,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598113366] [2022-03-20 12:46:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:16,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:16,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:16,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598113366] [2022-03-20 12:46:16,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598113366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:16,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744695987] [2022-03-20 12:46:16,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:16,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:16,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:16,552 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) [2022-03-20 12:46:16,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 12:46:16,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:16,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:16,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:46:16,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-20 12:46:16,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-20 12:46:16,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744695987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:16,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:16,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 29 [2022-03-20 12:46:16,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [694881341] [2022-03-20 12:46:16,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [694881341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:16,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:16,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 12:46:16,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038931702] [2022-03-20 12:46:16,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:16,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 12:46:16,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:16,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 12:46:16,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2022-03-20 12:46:16,954 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:17,402 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2022-03-20 12:46:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 12:46:17,403 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-20 12:46:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:17,404 INFO L225 Difference]: With dead ends: 175 [2022-03-20 12:46:17,404 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 12:46:17,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1556, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 12:46:17,405 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 228 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:17,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 45 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 12:46:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-03-20 12:46:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 94 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-03-20 12:46:17,420 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 92 [2022-03-20 12:46:17,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:17,421 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-03-20 12:46:17,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-03-20 12:46:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 12:46:17,421 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:17,421 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 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] [2022-03-20 12:46:17,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 12:46:17,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:17,622 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:17,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:17,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1272730321, now seen corresponding path program 43 times [2022-03-20 12:46:17,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:17,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074299811] [2022-03-20 12:46:17,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:17,623 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:17,623 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:17,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1272730321, now seen corresponding path program 44 times [2022-03-20 12:46:17,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:17,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498808076] [2022-03-20 12:46:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:17,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:17,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:17,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:17,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498808076] [2022-03-20 12:46:17,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498808076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:17,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966709997] [2022-03-20 12:46:17,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:17,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:17,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:17,936 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) [2022-03-20 12:46:17,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 12:46:18,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:18,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 12:46:18,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:18,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:46:18,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966709997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:18,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:18,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 65 [2022-03-20 12:46:18,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:18,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074299811] [2022-03-20 12:46:18,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074299811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:18,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:18,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 12:46:18,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017650151] [2022-03-20 12:46:18,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:18,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 12:46:18,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 12:46:18,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1388, Invalid=2772, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 12:46:18,949 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:19,433 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2022-03-20 12:46:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 12:46:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-20 12:46:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:19,434 INFO L225 Difference]: With dead ends: 179 [2022-03-20 12:46:19,434 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 12:46:19,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2333, Invalid=4977, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 12:46:19,436 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:19,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 40 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 12:46:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 12:46:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.268041237113402) internal successors, (123), 97 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-03-20 12:46:19,451 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 95 [2022-03-20 12:46:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:19,452 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-03-20 12:46:19,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-03-20 12:46:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 12:46:19,452 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:19,452 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 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] [2022-03-20 12:46:19,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 12:46:19,653 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,SelfDestructingSolverStorable28 [2022-03-20 12:46:19,653 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash 6650394, now seen corresponding path program 45 times [2022-03-20 12:46:19,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:19,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477793239] [2022-03-20 12:46:19,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:19,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:19,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:19,654 INFO L85 PathProgramCache]: Analyzing trace with hash 6650394, now seen corresponding path program 46 times [2022-03-20 12:46:19,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:19,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752863391] [2022-03-20 12:46:19,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:19,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:19,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2022-03-20 12:46:19,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:19,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752863391] [2022-03-20 12:46:19,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752863391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:19,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124298856] [2022-03-20 12:46:19,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:19,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:19,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:19,731 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) [2022-03-20 12:46:19,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 12:46:19,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:19,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:19,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 12:46:19,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 533 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:20,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 533 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 12:46:20,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124298856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:20,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:20,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 25, 25] total 50 [2022-03-20 12:46:20,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:20,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477793239] [2022-03-20 12:46:20,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477793239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:20,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:20,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:46:20,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127680912] [2022-03-20 12:46:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:20,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:46:20,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:46:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=1636, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 12:46:20,557 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:20,699 INFO L93 Difference]: Finished difference Result 258 states and 330 transitions. [2022-03-20 12:46:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:46:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-20 12:46:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:20,700 INFO L225 Difference]: With dead ends: 258 [2022-03-20 12:46:20,700 INFO L226 Difference]: Without dead ends: 242 [2022-03-20 12:46:20,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=832, Invalid=1924, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 12:46:20,701 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:20,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 29 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-20 12:46:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 166. [2022-03-20 12:46:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.29375) internal successors, (207), 160 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2022-03-20 12:46:20,730 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 98 [2022-03-20 12:46:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:20,730 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2022-03-20 12:46:20,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2022-03-20 12:46:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 12:46:20,731 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:20,731 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 40, 5, 5, 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] [2022-03-20 12:46:20,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:20,945 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:20,945 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash 576417944, now seen corresponding path program 47 times [2022-03-20 12:46:20,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2113939293] [2022-03-20 12:46:20,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:20,946 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:20,946 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:20,946 INFO L85 PathProgramCache]: Analyzing trace with hash 576417944, now seen corresponding path program 48 times [2022-03-20 12:46:20,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:20,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281978028] [2022-03-20 12:46:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 0 proven. 1245 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2022-03-20 12:46:21,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:21,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281978028] [2022-03-20 12:46:21,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281978028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:21,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068328538] [2022-03-20 12:46:21,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:21,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:21,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:21,089 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) [2022-03-20 12:46:21,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 12:46:21,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:21,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:21,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:46:21,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-03-20 12:46:21,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-03-20 12:46:21,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068328538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:21,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:21,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-20 12:46:21,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:21,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2113939293] [2022-03-20 12:46:21,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2113939293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:21,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:21,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:46:21,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037776360] [2022-03-20 12:46:21,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:21,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:46:21,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:46:21,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-20 12:46:21,805 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:21,973 INFO L93 Difference]: Finished difference Result 329 states and 424 transitions. [2022-03-20 12:46:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:46:21,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-20 12:46:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:21,974 INFO L225 Difference]: With dead ends: 329 [2022-03-20 12:46:21,974 INFO L226 Difference]: Without dead ends: 313 [2022-03-20 12:46:21,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-20 12:46:21,975 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:21,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 39 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-20 12:46:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 229. [2022-03-20 12:46:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.304932735426009) internal successors, (291), 223 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 296 transitions. [2022-03-20 12:46:22,031 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 296 transitions. Word has length 161 [2022-03-20 12:46:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:22,032 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 296 transitions. [2022-03-20 12:46:22,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 296 transitions. [2022-03-20 12:46:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-03-20 12:46:22,033 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:22,033 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 60, 5, 5, 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] [2022-03-20 12:46:22,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:22,250 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,SelfDestructingSolverStorable30 [2022-03-20 12:46:22,250 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:22,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:22,251 INFO L85 PathProgramCache]: Analyzing trace with hash 54436442, now seen corresponding path program 49 times [2022-03-20 12:46:22,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:22,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398675143] [2022-03-20 12:46:22,252 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:22,252 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:22,252 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash 54436442, now seen corresponding path program 50 times [2022-03-20 12:46:22,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:22,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733909157] [2022-03-20 12:46:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:22,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:22,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5538 backedges. 0 proven. 3732 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-20 12:46:22,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:22,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733909157] [2022-03-20 12:46:22,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733909157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:22,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194009736] [2022-03-20 12:46:22,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:22,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:22,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:22,406 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) [2022-03-20 12:46:22,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 12:46:22,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:22,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:46:22,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5538 backedges. 0 proven. 3732 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-20 12:46:23,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5538 backedges. 0 proven. 3732 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-20 12:46:23,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194009736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:23,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:23,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-03-20 12:46:23,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:23,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398675143] [2022-03-20 12:46:23,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398675143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:23,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:23,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:46:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174377523] [2022-03-20 12:46:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:23,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:46:23,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:46:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:46:23,683 INFO L87 Difference]: Start difference. First operand 229 states and 296 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:23,894 INFO L93 Difference]: Finished difference Result 400 states and 518 transitions. [2022-03-20 12:46:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:46:23,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-03-20 12:46:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:23,897 INFO L225 Difference]: With dead ends: 400 [2022-03-20 12:46:23,897 INFO L226 Difference]: Without dead ends: 384 [2022-03-20 12:46:23,897 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2022-03-20 12:46:23,897 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:23,897 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 29 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-03-20 12:46:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 292. [2022-03-20 12:46:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.3111888111888113) internal successors, (375), 286 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 380 transitions. [2022-03-20 12:46:23,965 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 380 transitions. Word has length 224 [2022-03-20 12:46:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:23,965 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 380 transitions. [2022-03-20 12:46:23,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 380 transitions. [2022-03-20 12:46:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-03-20 12:46:23,967 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:23,967 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 80, 5, 5, 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] [2022-03-20 12:46:23,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:24,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:24,184 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash -381796264, now seen corresponding path program 51 times [2022-03-20 12:46:24,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:24,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438329386] [2022-03-20 12:46:24,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:24,185 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:24,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:24,185 INFO L85 PathProgramCache]: Analyzing trace with hash -381796264, now seen corresponding path program 52 times [2022-03-20 12:46:24,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:24,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766483173] [2022-03-20 12:46:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:24,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:24,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2396 trivial. 0 not checked. [2022-03-20 12:46:24,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766483173] [2022-03-20 12:46:24,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766483173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416047199] [2022-03-20 12:46:24,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:24,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:24,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:24,402 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) [2022-03-20 12:46:24,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 12:46:24,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:24,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 12:46:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 536 proven. 3599 refuted. 0 times theorem prover too weak. 5723 trivial. 0 not checked. [2022-03-20 12:46:25,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 536 proven. 3599 refuted. 0 times theorem prover too weak. 5723 trivial. 0 not checked. [2022-03-20 12:46:25,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416047199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:25,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:25,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 25, 25] total 53 [2022-03-20 12:46:25,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:25,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438329386] [2022-03-20 12:46:25,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438329386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:25,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:25,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:46:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533451071] [2022-03-20 12:46:25,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:25,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:46:25,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:25,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:46:25,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=1924, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 12:46:25,901 INFO L87 Difference]: Start difference. First operand 292 states and 380 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:26,207 INFO L93 Difference]: Finished difference Result 406 states and 525 transitions. [2022-03-20 12:46:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:46:26,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-03-20 12:46:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:26,209 INFO L225 Difference]: With dead ends: 406 [2022-03-20 12:46:26,209 INFO L226 Difference]: Without dead ends: 390 [2022-03-20 12:46:26,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=886, Invalid=2536, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 12:46:26,210 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 220 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:26,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 34 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-20 12:46:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 355. [2022-03-20 12:46:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.3151862464183381) internal successors, (459), 349 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 464 transitions. [2022-03-20 12:46:26,292 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 464 transitions. Word has length 287 [2022-03-20 12:46:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:26,292 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 464 transitions. [2022-03-20 12:46:26,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 464 transitions. [2022-03-20 12:46:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-03-20 12:46:26,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:26,295 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:26,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:26,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:26,514 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash 587258522, now seen corresponding path program 53 times [2022-03-20 12:46:26,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:26,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [400540020] [2022-03-20 12:46:26,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:26,516 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:26,516 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:26,516 INFO L85 PathProgramCache]: Analyzing trace with hash 587258522, now seen corresponding path program 54 times [2022-03-20 12:46:26,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:26,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598441177] [2022-03-20 12:46:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:26,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:26,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:26,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:26,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598441177] [2022-03-20 12:46:26,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598441177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:26,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026662144] [2022-03-20 12:46:26,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:26,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:26,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:26,757 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) [2022-03-20 12:46:26,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 12:46:27,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:46:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:27,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:28,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026662144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:28,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:28,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-20 12:46:28,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [400540020] [2022-03-20 12:46:28,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [400540020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:28,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:28,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:46:28,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815762633] [2022-03-20 12:46:28,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:28,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:46:28,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:46:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:46:28,084 INFO L87 Difference]: Start difference. First operand 355 states and 464 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:28,242 INFO L93 Difference]: Finished difference Result 379 states and 491 transitions. [2022-03-20 12:46:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:46:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-03-20 12:46:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:28,243 INFO L225 Difference]: With dead ends: 379 [2022-03-20 12:46:28,243 INFO L226 Difference]: Without dead ends: 368 [2022-03-20 12:46:28,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2022-03-20 12:46:28,244 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:28,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-03-20 12:46:28,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 358. [2022-03-20 12:46:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 352 states have (on average 1.3125) internal successors, (462), 352 states have internal predecessors, (462), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 467 transitions. [2022-03-20 12:46:28,333 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 467 transitions. Word has length 350 [2022-03-20 12:46:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:28,333 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 467 transitions. [2022-03-20 12:46:28,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 467 transitions. [2022-03-20 12:46:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-03-20 12:46:28,334 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:28,334 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:28,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 12:46:28,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:28,547 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:28,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:28,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1194423610, now seen corresponding path program 55 times [2022-03-20 12:46:28,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:28,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159597011] [2022-03-20 12:46:28,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:28,548 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:28,548 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1194423610, now seen corresponding path program 56 times [2022-03-20 12:46:28,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:28,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437075117] [2022-03-20 12:46:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:28,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:28,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15425 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:28,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:28,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437075117] [2022-03-20 12:46:28,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437075117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:28,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556525810] [2022-03-20 12:46:28,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:28,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:28,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:28,796 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) [2022-03-20 12:46:28,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 12:46:29,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:29,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:29,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 12:46:29,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15425 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:29,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15425 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:30,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556525810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:30,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:30,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-03-20 12:46:30,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:30,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159597011] [2022-03-20 12:46:30,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159597011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:30,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:30,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:46:30,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066162830] [2022-03-20 12:46:30,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:30,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:46:30,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:46:30,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-03-20 12:46:30,224 INFO L87 Difference]: Start difference. First operand 358 states and 467 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:30,433 INFO L93 Difference]: Finished difference Result 386 states and 499 transitions. [2022-03-20 12:46:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:46:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 353 [2022-03-20 12:46:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:30,435 INFO L225 Difference]: With dead ends: 386 [2022-03-20 12:46:30,435 INFO L226 Difference]: Without dead ends: 375 [2022-03-20 12:46:30,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:46:30,436 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:30,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 44 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-20 12:46:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 361. [2022-03-20 12:46:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 355 states have (on average 1.3098591549295775) internal successors, (465), 355 states have internal predecessors, (465), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 470 transitions. [2022-03-20 12:46:30,514 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 470 transitions. Word has length 353 [2022-03-20 12:46:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:30,514 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 470 transitions. [2022-03-20 12:46:30,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 470 transitions. [2022-03-20 12:46:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-03-20 12:46:30,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:30,516 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:30,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:30,731 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,SelfDestructingSolverStorable34 [2022-03-20 12:46:30,731 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1152690534, now seen corresponding path program 57 times [2022-03-20 12:46:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:30,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414704587] [2022-03-20 12:46:30,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:30,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:30,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1152690534, now seen corresponding path program 58 times [2022-03-20 12:46:30,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:30,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428654214] [2022-03-20 12:46:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:30,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:31,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428654214] [2022-03-20 12:46:31,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428654214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458297766] [2022-03-20 12:46:31,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:31,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:31,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:31,004 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) [2022-03-20 12:46:31,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 12:46:31,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:31,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1958 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 12:46:31,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 537 proven. 4790 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-20 12:46:32,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 537 proven. 4790 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-20 12:46:32,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458297766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:32,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:32,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 27, 27] total 54 [2022-03-20 12:46:32,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:32,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414704587] [2022-03-20 12:46:32,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414704587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:32,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:32,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:46:32,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807845576] [2022-03-20 12:46:32,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:32,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:46:32,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:32,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:46:32,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2044, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 12:46:32,733 INFO L87 Difference]: Start difference. First operand 361 states and 470 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:32,979 INFO L93 Difference]: Finished difference Result 393 states and 507 transitions. [2022-03-20 12:46:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:46:32,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 356 [2022-03-20 12:46:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:32,981 INFO L225 Difference]: With dead ends: 393 [2022-03-20 12:46:32,981 INFO L226 Difference]: Without dead ends: 382 [2022-03-20 12:46:32,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=894, Invalid=2528, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 12:46:32,982 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 154 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:32,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 39 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-20 12:46:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 364. [2022-03-20 12:46:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.3072625698324023) internal successors, (468), 358 states have internal predecessors, (468), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 473 transitions. [2022-03-20 12:46:33,057 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 473 transitions. Word has length 356 [2022-03-20 12:46:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:33,057 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 473 transitions. [2022-03-20 12:46:33,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 473 transitions. [2022-03-20 12:46:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-03-20 12:46:33,059 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:33,059 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:33,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:33,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 12:46:33,273 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:33,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1962575558, now seen corresponding path program 59 times [2022-03-20 12:46:33,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:33,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1656391917] [2022-03-20 12:46:33,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:33,274 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:33,274 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1962575558, now seen corresponding path program 60 times [2022-03-20 12:46:33,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:33,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100767224] [2022-03-20 12:46:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:33,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:33,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15442 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:33,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:33,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100767224] [2022-03-20 12:46:33,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100767224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:33,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738696054] [2022-03-20 12:46:33,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:33,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:33,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:33,519 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) [2022-03-20 12:46:33,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 12:46:35,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 12:46:35,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:35,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15442 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:35,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15442 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:36,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738696054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:36,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:36,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-20 12:46:36,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1656391917] [2022-03-20 12:46:36,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1656391917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:36,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:36,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:46:36,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662280557] [2022-03-20 12:46:36,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:36,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:46:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:46:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-03-20 12:46:36,161 INFO L87 Difference]: Start difference. First operand 364 states and 473 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:36,428 INFO L93 Difference]: Finished difference Result 464 states and 600 transitions. [2022-03-20 12:46:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:46:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-03-20 12:46:36,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:36,430 INFO L225 Difference]: With dead ends: 464 [2022-03-20 12:46:36,430 INFO L226 Difference]: Without dead ends: 453 [2022-03-20 12:46:36,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:46:36,431 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:36,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 44 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-20 12:46:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 367. [2022-03-20 12:46:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.3047091412742382) internal successors, (471), 361 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 476 transitions. [2022-03-20 12:46:36,510 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 476 transitions. Word has length 359 [2022-03-20 12:46:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:36,510 INFO L478 AbstractCegarLoop]: Abstraction has 367 states and 476 transitions. [2022-03-20 12:46:36,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 476 transitions. [2022-03-20 12:46:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-03-20 12:46:36,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:36,511 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:36,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:36,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:36,712 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:36,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:36,712 INFO L85 PathProgramCache]: Analyzing trace with hash -121056614, now seen corresponding path program 61 times [2022-03-20 12:46:36,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:36,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1175604608] [2022-03-20 12:46:36,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:36,713 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:36,714 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash -121056614, now seen corresponding path program 62 times [2022-03-20 12:46:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:36,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885924027] [2022-03-20 12:46:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:36,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15455 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:36,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:36,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885924027] [2022-03-20 12:46:36,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885924027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:36,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855350894] [2022-03-20 12:46:36,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:36,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:36,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:36,962 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) [2022-03-20 12:46:36,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 12:46:37,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 12:46:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15455 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:37,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15455 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:38,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855350894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:38,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:38,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-20 12:46:38,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:38,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1175604608] [2022-03-20 12:46:38,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1175604608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:38,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:38,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:46:38,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749069983] [2022-03-20 12:46:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:38,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:46:38,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:38,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:46:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2022-03-20 12:46:38,518 INFO L87 Difference]: Start difference. First operand 367 states and 476 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:38,850 INFO L93 Difference]: Finished difference Result 539 states and 699 transitions. [2022-03-20 12:46:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 12:46:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2022-03-20 12:46:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:38,852 INFO L225 Difference]: With dead ends: 539 [2022-03-20 12:46:38,852 INFO L226 Difference]: Without dead ends: 528 [2022-03-20 12:46:38,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-03-20 12:46:38,853 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 237 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:38,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 47 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:46:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-03-20 12:46:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 370. [2022-03-20 12:46:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.3021978021978022) internal successors, (474), 364 states have internal predecessors, (474), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 479 transitions. [2022-03-20 12:46:38,938 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 479 transitions. Word has length 362 [2022-03-20 12:46:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:38,938 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 479 transitions. [2022-03-20 12:46:38,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:38,938 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 479 transitions. [2022-03-20 12:46:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-20 12:46:38,939 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:38,940 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 100, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:38,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:39,160 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,SelfDestructingSolverStorable37 [2022-03-20 12:46:39,160 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:39,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:39,161 INFO L85 PathProgramCache]: Analyzing trace with hash 952532282, now seen corresponding path program 63 times [2022-03-20 12:46:39,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:39,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761517049] [2022-03-20 12:46:39,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:39,162 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:39,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:39,163 INFO L85 PathProgramCache]: Analyzing trace with hash 952532282, now seen corresponding path program 64 times [2022-03-20 12:46:39,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:39,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425383070] [2022-03-20 12:46:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:39,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:39,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15471 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:39,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425383070] [2022-03-20 12:46:39,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425383070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:39,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413075758] [2022-03-20 12:46:39,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:39,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:39,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:39,427 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) [2022-03-20 12:46:39,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 12:46:39,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:39,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:39,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2000 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 12:46:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15471 backedges. 537 proven. 4829 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-20 12:46:40,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15471 backedges. 537 proven. 4829 refuted. 0 times theorem prover too weak. 10105 trivial. 0 not checked. [2022-03-20 12:46:41,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413075758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:41,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:41,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 30, 30] total 60 [2022-03-20 12:46:41,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:41,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761517049] [2022-03-20 12:46:41,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761517049] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:41,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:41,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 12:46:41,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215670193] [2022-03-20 12:46:41,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:41,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 12:46:41,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 12:46:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=2668, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 12:46:41,338 INFO L87 Difference]: Start difference. First operand 370 states and 479 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:41,758 INFO L93 Difference]: Finished difference Result 614 states and 798 transitions. [2022-03-20 12:46:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:46:41,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2022-03-20 12:46:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:41,760 INFO L225 Difference]: With dead ends: 614 [2022-03-20 12:46:41,760 INFO L226 Difference]: Without dead ends: 603 [2022-03-20 12:46:41,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=3503, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 12:46:41,761 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 280 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:41,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 42 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:46:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-20 12:46:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 373. [2022-03-20 12:46:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 367 states have (on average 1.2997275204359673) internal successors, (477), 367 states have internal predecessors, (477), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 482 transitions. [2022-03-20 12:46:41,845 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 482 transitions. Word has length 365 [2022-03-20 12:46:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:41,845 INFO L478 AbstractCegarLoop]: Abstraction has 373 states and 482 transitions. [2022-03-20 12:46:41,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:46:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 482 transitions. [2022-03-20 12:46:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-03-20 12:46:41,847 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:41,847 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 100, 7, 7, 7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:41,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 12:46:42,047 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,SelfDestructingSolverStorable38 [2022-03-20 12:46:42,047 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:42,048 INFO L85 PathProgramCache]: Analyzing trace with hash -382120294, now seen corresponding path program 65 times [2022-03-20 12:46:42,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:42,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1635693988] [2022-03-20 12:46:42,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:42,049 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:42,049 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash -382120294, now seen corresponding path program 66 times [2022-03-20 12:46:42,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:42,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958487514] [2022-03-20 12:46:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:42,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:42,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15490 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2022-03-20 12:46:42,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:42,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958487514] [2022-03-20 12:46:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958487514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74007592] [2022-03-20 12:46:42,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:42,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:42,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:42,288 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) [2022-03-20 12:46:42,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 12:46:52,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 12:46:52,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:52,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 12:46:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:52,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-03-20 12:46:53,061 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-20 12:46:53,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2022-03-20 12:46:53,175 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-20 12:46:53,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2022-03-20 12:46:53,284 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-20 12:46:53,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2022-03-20 12:46:53,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:53,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:53,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:46:53,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:46:53,375 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-20 12:46:53,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 58 [2022-03-20 12:46:53,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:53,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:53,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:46:53,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:46:53,584 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-20 12:46:53,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 73 [2022-03-20 12:46:54,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:46:54,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:54,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:46:54,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:46:54,157 INFO L356 Elim1Store]: treesize reduction 99, result has 19.5 percent of original size [2022-03-20 12:46:54,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 81 treesize of output 91 [2022-03-20 12:46:54,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:46:54,326 INFO L356 Elim1Store]: treesize reduction 50, result has 35.1 percent of original size [2022-03-20 12:46:54,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 61 [2022-03-20 12:46:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15490 backedges. 519 proven. 17 refuted. 0 times theorem prover too weak. 14954 trivial. 0 not checked. [2022-03-20 12:46:54,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:02,219 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_1176 Int)) (or (not (<= v_main_~x~0_1176 (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)))) (forall ((v_ArrVal_6099 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_1176 4) |c_main_~#distance~0.offset|) v_ArrVal_6099))) (let ((.cse1 (store |c_#memory_int| |c_main_~#distance~0.base| .cse0)) (.cse2 (* c_main_~j~0 4))) (<= (select .cse0 (+ (* 4 (select (select .cse1 |c_main_~#Dest~0.base|) (+ .cse2 4 |c_main_~#Dest~0.offset|))) |c_main_~#distance~0.offset|)) (+ (select .cse0 (+ (* (select (select .cse1 |c_main_~#Source~0.base|) (+ |c_main_~#Source~0.offset| .cse2 4)) 4) |c_main_~#distance~0.offset|)) (select (select .cse1 |c_main_~#Weight~0.base|) (+ |c_main_~#Weight~0.offset| .cse2 4))))))))) is different from false [2022-03-20 12:47:04,128 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_1176 Int) (v_ArrVal_6099 Int)) (or (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_1176 4) |c_main_~#distance~0.offset|) v_ArrVal_6099))) (let ((.cse1 (store |c_#memory_int| |c_main_~#distance~0.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) 4) |c_main_~#distance~0.offset|)) (+ (select (select .cse1 |c_main_~#Weight~0.base|) (+ |c_main_~#Weight~0.offset| 4)) (select .cse0 (+ (* (select (select .cse1 |c_main_~#Source~0.base|) (+ |c_main_~#Source~0.offset| 4)) 4) |c_main_~#distance~0.offset|)))))) (not (<= v_main_~x~0_1176 (select (select |c_#memory_int| |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|))))) is different from false [2022-03-20 12:47:18,529 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (or (not (< (+ main_~i~0 1) c_main_~nodecount~0)) (< (+ main_~i~0 2) c_main_~nodecount~0) (forall ((v_ArrVal_6098 Int) (v_ArrVal_6096 Int) (v_main_~x~0_1176 Int) (v_ArrVal_6099 Int)) (let ((.cse2 (let ((.cse3 (* main_~i~0 4))) (store (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ |c_main_~#distance~0.offset| .cse3) v_ArrVal_6096) (+ 4 |c_main_~#distance~0.offset| .cse3) v_ArrVal_6098)))) (or (let ((.cse0 (store .cse2 (+ (* v_main_~x~0_1176 4) |c_main_~#distance~0.offset|) v_ArrVal_6099))) (let ((.cse1 (store |c_#memory_int| |c_main_~#distance~0.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) 4) |c_main_~#distance~0.offset|)) (+ (select (select .cse1 |c_main_~#Weight~0.base|) (+ |c_main_~#Weight~0.offset| 4)) (select .cse0 (+ (* 4 (select (select .cse1 |c_main_~#Source~0.base|) (+ |c_main_~#Source~0.offset| 4))) |c_main_~#distance~0.offset|)))))) (not (<= v_main_~x~0_1176 (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse2) |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|))) (not (<= c_~INFINITY~0 v_ArrVal_6098)) (not (<= v_ArrVal_6096 c_~INFINITY~0))))))) is different from false [2022-03-20 12:47:19,442 INFO L356 Elim1Store]: treesize reduction 414, result has 23.8 percent of original size [2022-03-20 12:47:19,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 34154 treesize of output 15154