/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:09:42,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:09:42,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:09:42,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:09:42,393 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:09:42,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:09:42,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:09:42,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:09:42,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:09:42,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:09:42,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:09:42,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:09:42,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:09:42,414 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:09:42,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:09:42,415 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:09:42,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:09:42,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:09:42,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:09:42,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:09:42,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:09:42,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:09:42,416 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:09:42,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:09:42,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:09:42,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:09:42,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:09:42,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:09:42,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:09:42,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:09:42,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:09:42,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:09:42,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:09:42,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:09:42,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:09:42,417 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:09:42,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:09:42,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:09:42,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:09:42,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:09:42,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:09:42,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:09:42,615 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:09:42,615 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:09:42,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-03-19 23:09:42,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00c1a313/e9b5df0335b5409790b178ece89ce268/FLAG4a9b1ac16 [2022-03-19 23:09:42,994 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:09:42,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-03-19 23:09:43,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00c1a313/e9b5df0335b5409790b178ece89ce268/FLAG4a9b1ac16 [2022-03-19 23:09:43,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00c1a313/e9b5df0335b5409790b178ece89ce268 [2022-03-19 23:09:43,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:09:43,018 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:09:43,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:09:43,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:09:43,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:09:43,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@714cd6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43, skipping insertion in model container [2022-03-19 23:09:43,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:09:43,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:09:43,155 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-03-19 23:09:43,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:09:43,185 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:09:43,194 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-03-19 23:09:43,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:09:43,204 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:09:43,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43 WrapperNode [2022-03-19 23:09:43,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:09:43,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:09:43,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:09:43,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:09:43,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:09:43,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:09:43,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:09:43,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:09:43,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43" (1/1) ... [2022-03-19 23:09:43,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:09:43,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:43,254 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) [2022-03-19 23:09:43,258 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 [2022-03-19 23:09:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:09:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:09:43,287 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:09:43,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:09:43,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:09:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:09:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:09:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:09:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:09:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:09:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:09:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:09:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:09:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:09:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:09:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:09:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:09:43,333 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:09:43,334 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:09:43,415 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:09:43,439 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:09:43,439 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 23:09:43,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:09:43 BoogieIcfgContainer [2022-03-19 23:09:43,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:09:43,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:09:43,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:09:43,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:09:43,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:09:43" (1/3) ... [2022-03-19 23:09:43,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a823cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:09:43, skipping insertion in model container [2022-03-19 23:09:43,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:09:43" (2/3) ... [2022-03-19 23:09:43,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a823cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:09:43, skipping insertion in model container [2022-03-19 23:09:43,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:09:43" (3/3) ... [2022-03-19 23:09:43,445 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2022-03-19 23:09:43,448 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:09:43,448 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:09:43,496 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:09:43,500 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-19 23:09:43,501 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:09:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-03-19 23:09:43,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 23:09:43,512 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:43,513 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:43,513 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:43,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1440262230, now seen corresponding path program 1 times [2022-03-19 23:09:43,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:43,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919029092] [2022-03-19 23:09:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:43,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:43,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:09:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:43,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919029092] [2022-03-19 23:09:43,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919029092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:09:43,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:09:43,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:09:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789234412] [2022-03-19 23:09:43,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:09:43,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:09:43,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:09:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:09:43,726 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:43,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:43,795 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-03-19 23:09:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:09:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 23:09:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:43,802 INFO L225 Difference]: With dead ends: 40 [2022-03-19 23:09:43,802 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 23:09:43,804 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 [2022-03-19 23:09:43,809 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:43,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:09:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 23:09:43,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 23:09:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-19 23:09:43,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-03-19 23:09:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:43,833 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-19 23:09:43,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-19 23:09:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 23:09:43,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:43,835 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:43,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:09:43,835 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:43,838 INFO L85 PathProgramCache]: Analyzing trace with hash -273622713, now seen corresponding path program 1 times [2022-03-19 23:09:43,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:43,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479564586] [2022-03-19 23:09:43,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:43,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:43,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:09:43,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:43,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479564586] [2022-03-19 23:09:43,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479564586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:09:43,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658967394] [2022-03-19 23:09:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:43,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:43,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:43,898 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) [2022-03-19 23:09:43,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:09:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 23:09:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:09:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:09:44,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:09:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:09:44,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658967394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:09:44,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:09:44,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 23:09:44,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859731372] [2022-03-19 23:09:44,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:09:44,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:09:44,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:44,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:09:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:09:44,062 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:44,146 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-03-19 23:09:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:09:44,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-19 23:09:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:44,148 INFO L225 Difference]: With dead ends: 32 [2022-03-19 23:09:44,148 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 23:09:44,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:09:44,151 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:44,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 29 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:09:44,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 23:09:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-03-19 23:09:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-19 23:09:44,155 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-03-19 23:09:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:44,155 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-19 23:09:44,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-19 23:09:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 23:09:44,156 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:44,156 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:44,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:09:44,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:44,364 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash 341389949, now seen corresponding path program 1 times [2022-03-19 23:09:44,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:44,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091113113] [2022-03-19 23:09:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:44,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:44,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:09:44,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:44,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091113113] [2022-03-19 23:09:44,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091113113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:09:44,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:09:44,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:09:44,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24036468] [2022-03-19 23:09:44,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:09:44,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:09:44,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:44,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:09:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:09:44,397 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:44,428 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-03-19 23:09:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:09:44,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 23:09:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:44,429 INFO L225 Difference]: With dead ends: 35 [2022-03-19 23:09:44,429 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 23:09:44,429 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 [2022-03-19 23:09:44,430 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:44,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:09:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 23:09:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-19 23:09:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-19 23:09:44,439 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2022-03-19 23:09:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:44,439 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-19 23:09:44,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-19 23:09:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 23:09:44,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:44,440 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:44,440 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:09:44,440 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1266318508, now seen corresponding path program 1 times [2022-03-19 23:09:44,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:44,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006546897] [2022-03-19 23:09:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:44,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:44,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:09:44,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006546897] [2022-03-19 23:09:44,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006546897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:09:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303665177] [2022-03-19 23:09:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:44,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:44,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:44,516 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) [2022-03-19 23:09:44,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:09:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:44,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:09:44,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:09:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:09:44,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:09:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:09:44,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303665177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:09:44,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:09:44,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 23:09:44,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569088689] [2022-03-19 23:09:44,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:09:44,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:09:44,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:09:44,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:09:44,663 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:44,751 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-03-19 23:09:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:09:44,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 23:09:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:44,752 INFO L225 Difference]: With dead ends: 46 [2022-03-19 23:09:44,752 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 23:09:44,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:09:44,753 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:44,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:09:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 23:09:44,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 23:09:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-19 23:09:44,758 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2022-03-19 23:09:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:44,758 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-19 23:09:44,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-19 23:09:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 23:09:44,759 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:44,759 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:44,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:09:44,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 23:09:44,975 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash -978171832, now seen corresponding path program 2 times [2022-03-19 23:09:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:44,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247749756] [2022-03-19 23:09:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:45,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:09:45,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247749756] [2022-03-19 23:09:45,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247749756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:09:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527369388] [2022-03-19 23:09:45,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:09:45,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:45,091 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) [2022-03-19 23:09:45,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:09:45,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:09:45,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:09:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 23:09:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:09:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:09:45,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:09:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:09:45,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527369388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:09:45,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:09:45,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-19 23:09:45,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951851105] [2022-03-19 23:09:45,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:09:45,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:09:45,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:09:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:09:45,329 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:45,507 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2022-03-19 23:09:45,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:09:45,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 23:09:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:45,508 INFO L225 Difference]: With dead ends: 62 [2022-03-19 23:09:45,508 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 23:09:45,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:09:45,509 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:45,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 37 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:09:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 23:09:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 23:09:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-03-19 23:09:45,515 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 31 [2022-03-19 23:09:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:45,516 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-03-19 23:09:45,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-03-19 23:09:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 23:09:45,517 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:45,517 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:45,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:09:45,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:45,732 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash -903793104, now seen corresponding path program 3 times [2022-03-19 23:09:45,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:45,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806453834] [2022-03-19 23:09:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:45,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:45,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:09:45,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:45,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806453834] [2022-03-19 23:09:45,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806453834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:09:45,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058695768] [2022-03-19 23:09:45,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:09:45,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:45,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:45,875 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) [2022-03-19 23:09:45,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:09:45,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:09:45,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:09:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:09:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:09:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 23:09:46,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:09:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 23:09:46,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058695768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:09:46,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:09:46,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 7] total 25 [2022-03-19 23:09:46,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403187049] [2022-03-19 23:09:46,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:09:46,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 23:09:46,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 23:09:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:09:46,126 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:46,464 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-03-19 23:09:46,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 23:09:46,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-19 23:09:46,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:46,465 INFO L225 Difference]: With dead ends: 79 [2022-03-19 23:09:46,465 INFO L226 Difference]: Without dead ends: 62 [2022-03-19 23:09:46,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=653, Invalid=1509, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:09:46,466 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:46,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 42 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:09:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-19 23:09:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-03-19 23:09:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-03-19 23:09:46,471 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 47 [2022-03-19 23:09:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:46,472 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-03-19 23:09:46,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-03-19 23:09:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:09:46,473 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:46,473 INFO L499 BasicCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:46,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:09:46,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:46,687 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:46,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1024072408, now seen corresponding path program 4 times [2022-03-19 23:09:46,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:46,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038004151] [2022-03-19 23:09:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:46,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:46,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:09:46,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:46,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038004151] [2022-03-19 23:09:46,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038004151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:09:46,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631852394] [2022-03-19 23:09:46,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:09:46,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:46,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:46,876 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) [2022-03-19 23:09:46,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:09:46,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:09:46,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:09:46,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:09:46,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:09:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:09:46,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:09:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:09:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631852394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:09:47,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:09:47,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-19 23:09:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225041208] [2022-03-19 23:09:47,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:09:47,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 23:09:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 23:09:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 23:09:47,359 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:47,859 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2022-03-19 23:09:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:09:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-19 23:09:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:47,860 INFO L225 Difference]: With dead ends: 122 [2022-03-19 23:09:47,860 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 23:09:47,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:09:47,862 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:47,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 42 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:09:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 23:09:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-19 23:09:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-03-19 23:09:47,870 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 61 [2022-03-19 23:09:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:47,870 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-03-19 23:09:47,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-03-19 23:09:47,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 23:09:47,871 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:47,871 INFO L499 BasicCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:47,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:09:48,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:48,080 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:48,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1851025157, now seen corresponding path program 5 times [2022-03-19 23:09:48,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:48,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241355026] [2022-03-19 23:09:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:48,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:48,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:09:48,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:48,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241355026] [2022-03-19 23:09:48,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241355026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:09:48,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216447548] [2022-03-19 23:09:48,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:09:48,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:48,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:48,503 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) [2022-03-19 23:09:48,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:09:48,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-03-19 23:09:48,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:09:48,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:09:48,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:09:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 23:09:49,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:09:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 23:09:49,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216447548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:09:49,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:09:49,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 17, 17] total 66 [2022-03-19 23:09:49,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694164918] [2022-03-19 23:09:49,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:09:49,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 23:09:49,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 23:09:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 23:09:49,654 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:51,413 INFO L93 Difference]: Finished difference Result 240 states and 317 transitions. [2022-03-19 23:09:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 23:09:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-19 23:09:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:51,417 INFO L225 Difference]: With dead ends: 240 [2022-03-19 23:09:51,417 INFO L226 Difference]: Without dead ends: 214 [2022-03-19 23:09:51,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-03-19 23:09:51,421 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 280 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:51,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 45 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:09:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-19 23:09:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-03-19 23:09:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.186602870813397) internal successors, (248), 209 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 252 transitions. [2022-03-19 23:09:51,431 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 252 transitions. Word has length 95 [2022-03-19 23:09:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:51,431 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 252 transitions. [2022-03-19 23:09:51,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 252 transitions. [2022-03-19 23:09:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-19 23:09:51,434 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:51,434 INFO L499 BasicCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:51,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:09:51,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:51,643 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:51,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2023607811, now seen corresponding path program 6 times [2022-03-19 23:09:51,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:51,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070295447] [2022-03-19 23:09:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:51,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:52,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2022-03-19 23:09:52,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070295447] [2022-03-19 23:09:52,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070295447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:09:52,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174500402] [2022-03-19 23:09:52,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:09:52,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:52,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:52,155 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) [2022-03-19 23:09:52,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:09:52,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-19 23:09:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:09:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:09:52,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:09:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-03-19 23:09:52,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:09:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-03-19 23:09:52,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174500402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:09:52,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:09:52,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 7, 10] total 50 [2022-03-19 23:09:52,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636359343] [2022-03-19 23:09:52,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:09:52,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 23:09:52,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:53,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 23:09:53,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1044, Invalid=1406, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 23:09:53,001 INFO L87 Difference]: Start difference. First operand 214 states and 252 transitions. Second operand has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:53,968 INFO L93 Difference]: Finished difference Result 385 states and 480 transitions. [2022-03-19 23:09:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 23:09:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-03-19 23:09:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:53,970 INFO L225 Difference]: With dead ends: 385 [2022-03-19 23:09:53,970 INFO L226 Difference]: Without dead ends: 240 [2022-03-19 23:09:53,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3128, Invalid=6184, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 23:09:53,972 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 173 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:53,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 42 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:09:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-19 23:09:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-03-19 23:09:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2170212765957447) internal successors, (286), 235 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 290 transitions. [2022-03-19 23:09:53,981 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 290 transitions. Word has length 213 [2022-03-19 23:09:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:53,981 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 290 transitions. [2022-03-19 23:09:53,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 290 transitions. [2022-03-19 23:09:53,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-19 23:09:53,982 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:53,983 INFO L499 BasicCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:54,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:09:54,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:54,199 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash -194697488, now seen corresponding path program 7 times [2022-03-19 23:09:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:54,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494701874] [2022-03-19 23:09:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:54,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-03-19 23:09:54,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:54,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494701874] [2022-03-19 23:09:54,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494701874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:09:54,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517243716] [2022-03-19 23:09:54,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:09:54,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:54,729 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) [2022-03-19 23:09:54,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:09:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 23:09:54,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:09:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-03-19 23:09:55,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:09:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-03-19 23:09:56,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517243716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:09:56,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:09:56,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-19 23:09:56,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120230764] [2022-03-19 23:09:56,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:09:56,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-19 23:09:56,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:56,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-19 23:09:56,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 23:09:56,402 INFO L87 Difference]: Start difference. First operand 240 states and 290 transitions. Second operand has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:09:58,037 INFO L93 Difference]: Finished difference Result 478 states and 614 transitions. [2022-03-19 23:09:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 23:09:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-03-19 23:09:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:09:58,038 INFO L225 Difference]: With dead ends: 478 [2022-03-19 23:09:58,038 INFO L226 Difference]: Without dead ends: 312 [2022-03-19 23:09:58,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2022-03-19 23:09:58,043 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:09:58,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 57 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:09:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-19 23:09:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-03-19 23:09:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.1661237785016287) internal successors, (358), 307 states have internal predecessors, (358), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 362 transitions. [2022-03-19 23:09:58,058 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 362 transitions. Word has length 239 [2022-03-19 23:09:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:09:58,058 INFO L478 AbstractCegarLoop]: Abstraction has 312 states and 362 transitions. [2022-03-19 23:09:58,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:09:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 362 transitions. [2022-03-19 23:09:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-19 23:09:58,060 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:09:58,060 INFO L499 BasicCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:09:58,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:09:58,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 23:09:58,271 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:09:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:09:58,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1903859836, now seen corresponding path program 8 times [2022-03-19 23:09:58,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:09:58,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698636387] [2022-03-19 23:09:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:09:58,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:09:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:59,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:09:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:09:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-03-19 23:09:59,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:09:59,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698636387] [2022-03-19 23:09:59,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698636387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:09:59,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6538033] [2022-03-19 23:09:59,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:09:59,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:09:59,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:09:59,813 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) [2022-03-19 23:09:59,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:09:59,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:09:59,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:09:59,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-19 23:09:59,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:10:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-03-19 23:10:00,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-03-19 23:10:04,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6538033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:04,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:04,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-19 23:10:04,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205619742] [2022-03-19 23:10:04,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:04,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-03-19 23:10:04,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:04,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-03-19 23:10:04,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-19 23:10:04,681 INFO L87 Difference]: Start difference. First operand 312 states and 362 transitions. Second operand has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:10,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:10,696 INFO L93 Difference]: Finished difference Result 622 states and 794 transitions. [2022-03-19 23:10:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-03-19 23:10:10,696 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-03-19 23:10:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:10,698 INFO L225 Difference]: With dead ends: 622 [2022-03-19 23:10:10,698 INFO L226 Difference]: Without dead ends: 456 [2022-03-19 23:10:10,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12916 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=31033, Invalid=51623, Unknown=0, NotChecked=0, Total=82656 [2022-03-19 23:10:10,702 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:10,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 52 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:10:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-03-19 23:10:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-03-19 23:10:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 451 states have (on average 1.1130820399113082) internal successors, (502), 451 states have internal predecessors, (502), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 506 transitions. [2022-03-19 23:10:10,713 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 506 transitions. Word has length 311 [2022-03-19 23:10:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:10,714 INFO L478 AbstractCegarLoop]: Abstraction has 456 states and 506 transitions. [2022-03-19 23:10:10,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 506 transitions. [2022-03-19 23:10:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-03-19 23:10:10,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:10,718 INFO L499 BasicCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:10,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 23:10:10,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:10,931 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1375636652, now seen corresponding path program 9 times [2022-03-19 23:10:10,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:10,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073739834] [2022-03-19 23:10:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:10,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:16,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-03-19 23:10:16,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:16,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073739834] [2022-03-19 23:10:16,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073739834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:10:16,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719358199] [2022-03-19 23:10:16,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:10:16,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:16,512 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) [2022-03-19 23:10:16,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:10:16,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-19 23:10:16,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:10:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:10:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:10:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-03-19 23:10:17,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-03-19 23:10:19,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719358199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:19,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:19,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 13, 16] total 171 [2022-03-19 23:10:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660499989] [2022-03-19 23:10:19,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:19,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-03-19 23:10:19,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:19,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-03-19 23:10:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13870, Invalid=15200, Unknown=0, NotChecked=0, Total=29070 [2022-03-19 23:10:19,379 INFO L87 Difference]: Start difference. First operand 456 states and 506 transitions. Second operand has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:10:28,828 INFO L93 Difference]: Finished difference Result 675 states and 812 transitions. [2022-03-19 23:10:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-03-19 23:10:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-03-19 23:10:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:10:28,833 INFO L225 Difference]: With dead ends: 675 [2022-03-19 23:10:28,833 INFO L226 Difference]: Without dead ends: 506 [2022-03-19 23:10:28,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1245 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14711 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=41606, Invalid=72976, Unknown=0, NotChecked=0, Total=114582 [2022-03-19 23:10:28,838 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 572 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 968 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 968 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:10:28,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 47 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [968 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:10:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-03-19 23:10:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-03-19 23:10:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.1497005988023952) internal successors, (576), 501 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 580 transitions. [2022-03-19 23:10:28,849 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 580 transitions. Word has length 455 [2022-03-19 23:10:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:10:28,850 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 580 transitions. [2022-03-19 23:10:28,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:10:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 580 transitions. [2022-03-19 23:10:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-03-19 23:10:28,855 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:10:28,855 INFO L499 BasicCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:10:28,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 23:10:29,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 23:10:29,081 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:10:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:10:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1964115957, now seen corresponding path program 10 times [2022-03-19 23:10:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:10:29,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991731432] [2022-03-19 23:10:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:10:29,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:10:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:34,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:10:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:10:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-03-19 23:10:34,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:10:34,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991731432] [2022-03-19 23:10:34,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991731432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:10:34,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740036436] [2022-03-19 23:10:34,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:10:34,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:10:34,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:10:34,714 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) [2022-03-19 23:10:34,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:10:34,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:10:34,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:10:34,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 145 conjunts are in the unsatisfiable core [2022-03-19 23:10:34,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:10:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-03-19 23:10:35,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-03-19 23:10:52,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740036436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:52,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:52,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 292 [2022-03-19 23:10:52,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824934687] [2022-03-19 23:10:52,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:52,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 292 states [2022-03-19 23:10:52,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:52,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 292 interpolants. [2022-03-19 23:10:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42197, Invalid=42775, Unknown=0, NotChecked=0, Total=84972 [2022-03-19 23:10:52,287 INFO L87 Difference]: Start difference. First operand 506 states and 580 transitions. Second operand has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:11:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:11:15,906 INFO L93 Difference]: Finished difference Result 1010 states and 1303 transitions. [2022-03-19 23:11:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-03-19 23:11:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 505 [2022-03-19 23:11:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:11:15,909 INFO L225 Difference]: With dead ends: 1010 [2022-03-19 23:11:15,910 INFO L226 Difference]: Without dead ends: 796 [2022-03-19 23:11:15,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1445 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52482 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=126006, Invalid=209814, Unknown=0, NotChecked=0, Total=335820 [2022-03-19 23:11:15,923 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 299 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:11:15,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 52 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:11:15,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-03-19 23:11:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2022-03-19 23:11:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 791 states have (on average 1.0948166877370418) internal successors, (866), 791 states have internal predecessors, (866), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:11:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 870 transitions. [2022-03-19 23:11:15,941 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 870 transitions. Word has length 505 [2022-03-19 23:11:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:11:15,942 INFO L478 AbstractCegarLoop]: Abstraction has 796 states and 870 transitions. [2022-03-19 23:11:15,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:11:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 870 transitions. [2022-03-19 23:11:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-03-19 23:11:15,947 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:11:15,947 INFO L499 BasicCegarLoop]: trace histogram [340, 288, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:11:15,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 23:11:16,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 23:11:16,151 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:11:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:11:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 571682, now seen corresponding path program 11 times [2022-03-19 23:11:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:11:16,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275029486] [2022-03-19 23:11:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:11:16,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:11:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:11:38,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:11:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:11:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 29767 proven. 83232 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-03-19 23:11:38,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:11:38,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275029486] [2022-03-19 23:11:38,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275029486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:11:38,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891247988] [2022-03-19 23:11:38,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:11:38,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:11:38,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:11:38,285 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) [2022-03-19 23:11:38,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:11:38,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 298 check-sat command(s) [2022-03-19 23:11:38,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:11:38,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 151 conjunts are in the unsatisfiable core [2022-03-19 23:11:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:12:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-03-19 23:12:08,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:12:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-03-19 23:12:50,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891247988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:12:50,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:12:50,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [292, 151, 151] total 590 [2022-03-19 23:12:50,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31535544] [2022-03-19 23:12:50,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:12:50,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 590 states [2022-03-19 23:12:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:12:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 590 interpolants. [2022-03-19 23:12:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173168, Invalid=174342, Unknown=0, NotChecked=0, Total=347510 [2022-03-19 23:12:50,388 INFO L87 Difference]: Start difference. First operand 796 states and 870 transitions. Second operand has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:17:45,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:17:45,934 INFO L93 Difference]: Finished difference Result 2084 states and 2769 transitions. [2022-03-19 23:17:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 590 states. [2022-03-19 23:17:45,935 INFO L78 Accepts]: Start accepts. Automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 795 [2022-03-19 23:17:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:17:45,940 INFO L225 Difference]: With dead ends: 2084 [2022-03-19 23:17:45,940 INFO L226 Difference]: Without dead ends: 1870 [2022-03-19 23:17:46,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 1592 SyntacticMatches, 0 SemanticMatches, 1175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183157 ImplicationChecksByTransitivity, 196.2s TimeCoverageRelationStatistics Valid=519498, Invalid=864654, Unknown=0, NotChecked=0, Total=1384152 [2022-03-19 23:17:46,031 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 4476 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 5207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 7052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5207 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:17:46,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 65 Invalid, 7052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5207 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 23:17:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-03-19 23:17:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1870. [2022-03-19 23:17:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1865 states have (on average 1.1839142091152814) internal successors, (2208), 1865 states have internal predecessors, (2208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:17:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2212 transitions. [2022-03-19 23:17:46,068 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2212 transitions. Word has length 795 [2022-03-19 23:17:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:17:46,069 INFO L478 AbstractCegarLoop]: Abstraction has 1870 states and 2212 transitions. [2022-03-19 23:17:46,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:17:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2212 transitions. [2022-03-19 23:17:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1870 [2022-03-19 23:17:46,093 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:17:46,093 INFO L499 BasicCegarLoop]: trace histogram [609, 320, 320, 298, 289, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:17:46,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 23:17:46,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 23:17:46,294 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:17:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:17:46,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1769215277, now seen corresponding path program 12 times [2022-03-19 23:17:46,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:17:46,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728780226] [2022-03-19 23:17:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:17:46,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:17:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:18:09,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:18:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:18:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 185310 proven. 83810 refuted. 0 times theorem prover too weak. 203841 trivial. 0 not checked. [2022-03-19 23:18:09,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:18:09,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728780226] [2022-03-19 23:18:09,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728780226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:18:09,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018287271] [2022-03-19 23:18:09,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:18:09,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:18:09,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:18:09,364 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) [2022-03-19 23:18:09,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 23:18:09,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-03-19 23:18:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:18:09,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 23:18:09,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:18:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-03-19 23:18:15,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:18:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-03-19 23:18:20,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018287271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:18:20,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:18:20,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [293, 25, 28] total 342 [2022-03-19 23:18:20,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137914560] [2022-03-19 23:18:20,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:18:20,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 342 states [2022-03-19 23:18:20,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:18:20,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 342 interpolants. [2022-03-19 23:18:20,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56962, Invalid=59660, Unknown=0, NotChecked=0, Total=116622 [2022-03-19 23:18:20,755 INFO L87 Difference]: Start difference. First operand 1870 states and 2212 transitions. Second operand has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:19:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:19:01,731 INFO L93 Difference]: Finished difference Result 3257 states and 4014 transitions. [2022-03-19 23:19:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2022-03-19 23:19:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1869 [2022-03-19 23:19:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:19:01,743 INFO L225 Difference]: With dead ends: 3257 [2022-03-19 23:19:01,743 INFO L226 Difference]: Without dead ends: 1968 [2022-03-19 23:19:01,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4415 GetRequests, 3736 SyntacticMatches, 0 SemanticMatches, 679 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58832 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=170882, Invalid=292198, Unknown=0, NotChecked=0, Total=463080 [2022-03-19 23:19:01,762 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 821 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 2056 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2056 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:19:01,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 87 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2056 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:19:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-03-19 23:19:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1968. [2022-03-19 23:19:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1963 states have (on average 1.1991849210392256) internal successors, (2354), 1963 states have internal predecessors, (2354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:19:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2358 transitions. [2022-03-19 23:19:01,799 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2358 transitions. Word has length 1869 [2022-03-19 23:19:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:19:01,800 INFO L478 AbstractCegarLoop]: Abstraction has 1968 states and 2358 transitions. [2022-03-19 23:19:01,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:19:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2358 transitions. [2022-03-19 23:19:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1968 [2022-03-19 23:19:01,826 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:19:01,827 INFO L499 BasicCegarLoop]: trace histogram [634, 344, 344, 298, 290, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:19:01,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 23:19:02,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 23:19:02,039 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:19:02,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:19:02,040 INFO L85 PathProgramCache]: Analyzing trace with hash 312609672, now seen corresponding path program 13 times [2022-03-19 23:19:02,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:19:02,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283212551] [2022-03-19 23:19:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:19:02,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:19:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:19:25,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:19:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:19:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-03-19 23:19:25,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:19:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283212551] [2022-03-19 23:19:25,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283212551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:19:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079190026] [2022-03-19 23:19:25,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:19:25,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:19:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:19:25,292 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) [2022-03-19 23:19:25,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 23:19:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:19:25,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 3623 conjuncts, 292 conjunts are in the unsatisfiable core [2022-03-19 23:19:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:19:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-03-19 23:19:27,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-03-19 23:20:37,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079190026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:37,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:37,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [294, 293, 293] total 586 [2022-03-19 23:20:37,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596844750] [2022-03-19 23:20:37,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:37,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 586 states [2022-03-19 23:20:37,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:37,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 586 interpolants. [2022-03-19 23:20:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170822, Invalid=171988, Unknown=0, NotChecked=0, Total=342810 [2022-03-19 23:20:37,616 INFO L87 Difference]: Start difference. First operand 1968 states and 2358 transitions. Second operand has 586 states, 586 states have (on average 2.015358361774744) internal successors, (1181), 585 states have internal predecessors, (1181), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)