/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/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 12:26:15,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 12:26:15,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 12:26:15,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 12:26:16,032 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 [2022-03-18 12:26:16,056 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 12:26:16,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 12:26:16,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 12:26:16,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 12:26:16,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 12:26:16,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 12:26:16,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 12:26:16,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 12:26:16,058 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 12:26:16,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 12:26:16,059 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 12:26:16,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 12:26:16,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 12:26:16,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 12:26:16,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 12:26:16,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 12:26:16,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 12:26:16,060 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 12:26:16,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 12:26:16,060 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 12:26:16,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 12:26:16,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 12:26:16,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 12:26:16,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 12:26:16,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:26:16,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 12:26:16,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 12:26:16,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 12:26:16,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 12:26:16,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 12:26:16,062 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 12:26:16,062 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 12:26:16,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 12:26:16,062 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 12:26:16,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 12:26:16,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 12:26:16,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 12:26:16,273 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 12:26:16,273 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 12:26:16,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-03-18 12:26:16,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb94b18a6/a42dc96a0190478e843f8be6a3f1de9a/FLAG83b6e8466 [2022-03-18 12:26:16,689 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 12:26:16,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-03-18 12:26:16,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb94b18a6/a42dc96a0190478e843f8be6a3f1de9a/FLAG83b6e8466 [2022-03-18 12:26:16,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb94b18a6/a42dc96a0190478e843f8be6a3f1de9a [2022-03-18 12:26:16,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 12:26:16,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 12:26:16,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 12:26:16,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 12:26:16,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 12:26:16,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b4f6e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16, skipping insertion in model container [2022-03-18 12:26:16,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 12:26:16,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 12:26:16,867 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/Mono4_1.c[311,324] [2022-03-18 12:26:16,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:26:16,886 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 12:26:16,893 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/Mono4_1.c[311,324] [2022-03-18 12:26:16,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:26:16,906 INFO L208 MainTranslator]: Completed translation [2022-03-18 12:26:16,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16 WrapperNode [2022-03-18 12:26:16,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 12:26:16,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 12:26:16,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 12:26:16,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 12:26:16,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 12:26:16,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 12:26:16,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 12:26:16,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 12:26:16,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16" (1/1) ... [2022-03-18 12:26:16,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:26:16,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:16,970 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) [2022-03-18 12:26:16,984 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 [2022-03-18 12:26:17,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 12:26:17,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 12:26:17,014 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 12:26:17,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 12:26:17,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 12:26:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 12:26:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 12:26:17,058 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 12:26:17,059 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 12:26:17,118 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 12:26:17,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 12:26:17,121 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 12:26:17,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:26:17 BoogieIcfgContainer [2022-03-18 12:26:17,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 12:26:17,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 12:26:17,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 12:26:17,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 12:26:17,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:26:16" (1/3) ... [2022-03-18 12:26:17,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42263a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:26:17, skipping insertion in model container [2022-03-18 12:26:17,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:26:16" (2/3) ... [2022-03-18 12:26:17,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42263a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:26:17, skipping insertion in model container [2022-03-18 12:26:17,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:26:17" (3/3) ... [2022-03-18 12:26:17,127 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2022-03-18 12:26:17,130 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 12:26:17,130 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 12:26:17,156 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 12:26:17,160 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 [2022-03-18 12:26:17,160 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 12:26:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-03-18 12:26:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 12:26:17,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:17,172 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:17,172 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2022-03-18 12:26:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:17,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016273858] [2022-03-18 12:26:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:17,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:26:17,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:17,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016273858] [2022-03-18 12:26:17,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016273858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:26:17,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:26:17,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 12:26:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149284558] [2022-03-18 12:26:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:26:17,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 12:26:17,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:17,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 12:26:17,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 12:26:17,327 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:26:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:17,370 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 12:26:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 12:26:17,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 12:26:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:17,375 INFO L225 Difference]: With dead ends: 32 [2022-03-18 12:26:17,375 INFO L226 Difference]: Without dead ends: 13 [2022-03-18 12:26:17,377 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 12:26:17,379 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:17,380 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:26:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-18 12:26:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-18 12:26:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-03-18 12:26:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-18 12:26:17,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-18 12:26:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:17,408 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-18 12:26:17,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:26:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-18 12:26:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 12:26:17,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:17,409 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:17,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 12:26:17,409 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-03-18 12:26:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:17,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743103770] [2022-03-18 12:26:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:17,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:17,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:26:17,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:17,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743103770] [2022-03-18 12:26:17,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743103770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:26:17,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:26:17,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 12:26:17,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252404492] [2022-03-18 12:26:17,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:26:17,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 12:26:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:17,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 12:26:17,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 12:26:17,460 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:26:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:17,491 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-18 12:26:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 12:26:17,492 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 [2022-03-18 12:26:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:17,492 INFO L225 Difference]: With dead ends: 22 [2022-03-18 12:26:17,492 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 12:26:17,493 INFO L911 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 [2022-03-18 12:26:17,494 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:17,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:26:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 12:26:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-18 12:26:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-03-18 12:26:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-18 12:26:17,512 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-18 12:26:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:17,512 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-18 12:26:17,512 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) [2022-03-18 12:26:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-18 12:26:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 12:26:17,513 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:17,513 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:17,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 12:26:17,513 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:17,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2022-03-18 12:26:17,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:17,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047866432] [2022-03-18 12:26:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:17,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:17,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:26:17,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:17,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047866432] [2022-03-18 12:26:17,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047866432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:17,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994713365] [2022-03-18 12:26:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:17,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:17,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:17,577 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) [2022-03-18 12:26:17,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 12:26:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 12:26:17,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:26:17,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:26:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:26:17,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994713365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:26:17,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:26:17,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 12:26:17,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69668737] [2022-03-18 12:26:17,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:26:17,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 12:26:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:17,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 12:26:17,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 12:26:17,751 INFO L87 Difference]: Start difference. First operand 15 states and 16 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) [2022-03-18 12:26:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:17,823 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-03-18 12:26:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 12:26:17,824 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 [2022-03-18 12:26:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:17,825 INFO L225 Difference]: With dead ends: 27 [2022-03-18 12:26:17,825 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 12:26:17,828 INFO L911 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 [2022-03-18 12:26:17,829 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:17,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:26:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 12:26:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 12:26:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2022-03-18 12:26:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-18 12:26:17,848 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-03-18 12:26:17,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:17,848 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-18 12:26:17,849 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) [2022-03-18 12:26:17,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-18 12:26:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 12:26:17,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:17,849 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:17,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 12:26:18,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:18,068 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1212152141, now seen corresponding path program 1 times [2022-03-18 12:26:18,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:18,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372674704] [2022-03-18 12:26:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:18,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:18,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:26:18,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:18,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372674704] [2022-03-18 12:26:18,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372674704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250835720] [2022-03-18 12:26:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:18,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:18,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:18,173 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) [2022-03-18 12:26:18,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 12:26:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:18,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 12:26:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:26:18,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:26:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:26:18,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250835720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:26:18,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:26:18,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 12:26:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231833001] [2022-03-18 12:26:18,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:26:18,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 12:26:18,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 12:26:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 12:26:18,326 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-03-18 12:26:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:18,426 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-03-18 12:26:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 12:26:18,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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 19 [2022-03-18 12:26:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:18,429 INFO L225 Difference]: With dead ends: 38 [2022-03-18 12:26:18,429 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 12:26:18,430 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 12:26:18,434 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:18,434 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:26:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 12:26:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-18 12:26:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-03-18 12:26:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-18 12:26:18,443 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-18 12:26:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:18,443 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-18 12:26:18,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-03-18 12:26:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-18 12:26:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 12:26:18,444 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:18,444 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:18,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 12:26:18,655 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 [2022-03-18 12:26:18,656 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1751481511, now seen corresponding path program 2 times [2022-03-18 12:26:18,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:18,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277081347] [2022-03-18 12:26:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:18,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:18,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:26:18,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:18,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277081347] [2022-03-18 12:26:18,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277081347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:18,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906060369] [2022-03-18 12:26:18,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:26:18,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:18,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:18,760 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) [2022-03-18 12:26:18,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 12:26:18,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:26:18,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:26:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 12:26:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:26:18,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:26:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:26:18,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906060369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:26:18,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:26:18,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 12:26:18,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57015377] [2022-03-18 12:26:18,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:26:18,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 12:26:18,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:18,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 12:26:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:26:18,990 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-03-18 12:26:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:19,186 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-18 12:26:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 12:26:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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 27 [2022-03-18 12:26:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:19,187 INFO L225 Difference]: With dead ends: 54 [2022-03-18 12:26:19,187 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 12:26:19,187 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-18 12:26:19,188 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:19,188 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:26:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 12:26:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-18 12:26:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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) [2022-03-18 12:26:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-18 12:26:19,192 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-18 12:26:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:19,192 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-18 12:26:19,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-03-18 12:26:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-18 12:26:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 12:26:19,193 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:19,193 INFO L500 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:19,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 12:26:19,394 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 [2022-03-18 12:26:19,394 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:19,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2029859697, now seen corresponding path program 3 times [2022-03-18 12:26:19,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:19,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466263595] [2022-03-18 12:26:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:19,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:26:19,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466263595] [2022-03-18 12:26:19,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466263595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177837755] [2022-03-18 12:26:19,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:26:19,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:19,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:19,628 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) [2022-03-18 12:26:19,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 12:26:19,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 12:26:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:26:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 12:26:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 12:26:19,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:26:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 12:26:19,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177837755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:26:19,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:26:19,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 28 [2022-03-18 12:26:19,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457087793] [2022-03-18 12:26:19,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:26:19,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 12:26:19,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:19,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 12:26:19,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-18 12:26:19,995 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:26:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:20,455 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-03-18 12:26:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 12:26:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-18 12:26:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:20,456 INFO L225 Difference]: With dead ends: 88 [2022-03-18 12:26:20,456 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 12:26:20,457 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=2231, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 12:26:20,458 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:20,458 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 52 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:26:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 12:26:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-03-18 12:26:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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) [2022-03-18 12:26:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-18 12:26:20,464 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2022-03-18 12:26:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:20,464 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-18 12:26:20,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:26:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-18 12:26:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 12:26:20,465 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:20,465 INFO L500 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:20,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 12:26:20,675 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 [2022-03-18 12:26:20,675 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash -741035816, now seen corresponding path program 4 times [2022-03-18 12:26:20,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:20,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140847173] [2022-03-18 12:26:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:20,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:20,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 12:26:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140847173] [2022-03-18 12:26:20,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140847173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642490316] [2022-03-18 12:26:20,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:26:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:20,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:20,885 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) [2022-03-18 12:26:20,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 12:26:20,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:26:20,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:26:20,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 12:26:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 12:26:21,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:26:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 12:26:21,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642490316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:26:21,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:26:21,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 12:26:21,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500111245] [2022-03-18 12:26:21,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:26:21,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 12:26:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 12:26:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 12:26:21,435 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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) [2022-03-18 12:26:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:21,921 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2022-03-18 12:26:21,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 12:26:21,922 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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 53 [2022-03-18 12:26:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:21,923 INFO L225 Difference]: With dead ends: 104 [2022-03-18 12:26:21,923 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 12:26:21,924 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 12:26:21,925 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:21,925 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:26:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 12:26:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-18 12:26:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 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) [2022-03-18 12:26:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-03-18 12:26:21,941 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 53 [2022-03-18 12:26:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:21,941 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-03-18 12:26:21,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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) [2022-03-18 12:26:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-03-18 12:26:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 12:26:21,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:21,943 INFO L500 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:21,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 12:26:22,160 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 [2022-03-18 12:26:22,160 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:22,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1742869445, now seen corresponding path program 5 times [2022-03-18 12:26:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:22,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984412887] [2022-03-18 12:26:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:22,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:22,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 12:26:22,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:22,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984412887] [2022-03-18 12:26:22,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984412887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:22,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284855162] [2022-03-18 12:26:22,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:26:22,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:22,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:22,597 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) [2022-03-18 12:26:22,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 12:26:22,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-18 12:26:22,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:26:22,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 12:26:22,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 12:26:22,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:26:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 12:26:23,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284855162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:26:23,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:26:23,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-18 12:26:23,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799052638] [2022-03-18 12:26:23,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:26:23,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 12:26:23,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 12:26:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 12:26:23,993 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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) [2022-03-18 12:26:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:25,530 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2022-03-18 12:26:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 12:26:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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 87 [2022-03-18 12:26:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:25,532 INFO L225 Difference]: With dead ends: 172 [2022-03-18 12:26:25,532 INFO L226 Difference]: Without dead ends: 156 [2022-03-18 12:26:25,536 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 12:26:25,536 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:25,536 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 34 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:26:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-18 12:26:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-03-18 12:26:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0463576158940397) internal successors, (158), 151 states have internal predecessors, (158), 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) [2022-03-18 12:26:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2022-03-18 12:26:25,545 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 87 [2022-03-18 12:26:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:25,545 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2022-03-18 12:26:25,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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) [2022-03-18 12:26:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2022-03-18 12:26:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 12:26:25,547 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:25,547 INFO L500 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:25,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 12:26:25,764 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 [2022-03-18 12:26:25,765 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:25,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1740552159, now seen corresponding path program 6 times [2022-03-18 12:26:25,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:25,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876588273] [2022-03-18 12:26:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:25,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:27,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 12:26:27,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:27,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876588273] [2022-03-18 12:26:27,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876588273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:27,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644893462] [2022-03-18 12:26:27,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:26:27,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:27,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:27,364 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) [2022-03-18 12:26:27,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 12:26:27,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-03-18 12:26:27,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:26:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 12:26:27,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-18 12:26:27,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:26:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-18 12:26:28,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644893462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:26:28,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:26:28,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 12, 12] total 88 [2022-03-18 12:26:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650028768] [2022-03-18 12:26:28,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:26:28,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 12:26:28,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 12:26:28,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2484, Invalid=5172, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 12:26:28,425 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand has 88 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:26:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:31,460 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2022-03-18 12:26:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 12:26:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-18 12:26:31,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:31,462 INFO L225 Difference]: With dead ends: 230 [2022-03-18 12:26:31,462 INFO L226 Difference]: Without dead ends: 204 [2022-03-18 12:26:31,466 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5540 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9439, Invalid=22423, Unknown=0, NotChecked=0, Total=31862 [2022-03-18 12:26:31,467 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 308 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:31,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 77 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:26:31,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-18 12:26:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 174. [2022-03-18 12:26:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0887573964497042) internal successors, (184), 169 states have internal predecessors, (184), 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) [2022-03-18 12:26:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 188 transitions. [2022-03-18 12:26:31,477 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 188 transitions. Word has length 155 [2022-03-18 12:26:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:31,477 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 188 transitions. [2022-03-18 12:26:31,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:26:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 188 transitions. [2022-03-18 12:26:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 12:26:31,479 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:31,479 INFO L500 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:31,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 12:26:31,696 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 [2022-03-18 12:26:31,697 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash 223511316, now seen corresponding path program 7 times [2022-03-18 12:26:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:31,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622604623] [2022-03-18 12:26:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:31,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 12:26:32,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622604623] [2022-03-18 12:26:32,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622604623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459536776] [2022-03-18 12:26:32,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:26:32,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:32,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:32,924 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) [2022-03-18 12:26:32,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 12:26:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:32,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 12:26:32,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 12:26:33,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:26:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 12:26:36,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459536776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:26:36,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:26:36,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 12:26:36,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035628645] [2022-03-18 12:26:36,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:26:36,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-18 12:26:36,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:26:36,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-18 12:26:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 12:26:36,500 INFO L87 Difference]: Start difference. First operand 174 states and 188 transitions. Second operand has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 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) [2022-03-18 12:26:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:41,994 INFO L93 Difference]: Finished difference Result 344 states and 440 transitions. [2022-03-18 12:26:41,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-18 12:26:41,995 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 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 173 [2022-03-18 12:26:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:41,996 INFO L225 Difference]: With dead ends: 344 [2022-03-18 12:26:41,996 INFO L226 Difference]: Without dead ends: 312 [2022-03-18 12:26:42,000 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-18 12:26:42,001 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:42,001 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 34 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:26:42,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-18 12:26:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-03-18 12:26:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.0488599348534202) internal successors, (322), 307 states have internal predecessors, (322), 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) [2022-03-18 12:26:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2022-03-18 12:26:42,012 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 173 [2022-03-18 12:26:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:42,012 INFO L478 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2022-03-18 12:26:42,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 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) [2022-03-18 12:26:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2022-03-18 12:26:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-18 12:26:42,015 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:42,015 INFO L500 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:42,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 12:26:42,232 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 [2022-03-18 12:26:42,232 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1145596517, now seen corresponding path program 8 times [2022-03-18 12:26:42,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:42,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542753371] [2022-03-18 12:26:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:42,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:47,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 12:26:47,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:47,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542753371] [2022-03-18 12:26:47,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542753371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:47,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123974501] [2022-03-18 12:26:47,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:26:47,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:47,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:47,170 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) [2022-03-18 12:26:47,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 12:26:47,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:26:47,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:26:47,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-18 12:26:47,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 12:26:47,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:27:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 12:27:02,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123974501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:27:02,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:27:02,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-18 12:27:02,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248912281] [2022-03-18 12:27:02,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:27:02,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-18 12:27:02,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:27:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-18 12:27:02,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-18 12:27:02,119 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 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) [2022-03-18 12:27:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:27:18,289 INFO L93 Difference]: Finished difference Result 620 states and 785 transitions. [2022-03-18 12:27:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-18 12:27:18,289 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 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 [2022-03-18 12:27:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:27:18,292 INFO L225 Difference]: With dead ends: 620 [2022-03-18 12:27:18,292 INFO L226 Difference]: Without dead ends: 588 [2022-03-18 12:27:18,304 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-18 12:27:18,304 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:27:18,305 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 49 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 12:27:18,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-18 12:27:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2022-03-18 12:27:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 583 states have (on average 1.0257289879931388) internal successors, (598), 583 states have internal predecessors, (598), 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) [2022-03-18 12:27:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 602 transitions. [2022-03-18 12:27:18,321 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 602 transitions. Word has length 311 [2022-03-18 12:27:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:27:18,322 INFO L478 AbstractCegarLoop]: Abstraction has 588 states and 602 transitions. [2022-03-18 12:27:18,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 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) [2022-03-18 12:27:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 602 transitions. [2022-03-18 12:27:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-03-18 12:27:18,329 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:27:18,329 INFO L500 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:27:18,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 12:27:18,545 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 [2022-03-18 12:27:18,545 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:27:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:27:18,546 INFO L85 PathProgramCache]: Analyzing trace with hash 630850887, now seen corresponding path program 9 times [2022-03-18 12:27:18,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:27:18,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358404832] [2022-03-18 12:27:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:27:18,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:27:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:27:32,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:27:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:27:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 12:27:32,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:27:32,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358404832] [2022-03-18 12:27:32,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358404832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:27:32,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650577022] [2022-03-18 12:27:32,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:27:32,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:27:32,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:27:32,888 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) [2022-03-18 12:27:32,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 12:27:32,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-18 12:27:32,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:27:32,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 12:27:32,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:27:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-18 12:27:34,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:27:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-18 12:27:36,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650577022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:27:36,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:27:36,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 20, 20] total 312 [2022-03-18 12:27:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10605574] [2022-03-18 12:27:36,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:27:36,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 312 states [2022-03-18 12:27:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:27:36,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 312 interpolants. [2022-03-18 12:27:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38748, Invalid=58284, Unknown=0, NotChecked=0, Total=97032 [2022-03-18 12:27:36,403 INFO L87 Difference]: Start difference. First operand 588 states and 602 transitions. Second operand has 312 states, 310 states have (on average 2.0129032258064514) internal successors, (624), 310 states have internal predecessors, (624), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:28:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:28:03,051 INFO L93 Difference]: Finished difference Result 726 states and 805 transitions. [2022-03-18 12:28:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2022-03-18 12:28:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 312 states, 310 states have (on average 2.0129032258064514) internal successors, (624), 310 states have internal predecessors, (624), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 587 [2022-03-18 12:28:03,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:28:03,059 INFO L225 Difference]: With dead ends: 726 [2022-03-18 12:28:03,059 INFO L226 Difference]: Without dead ends: 676 [2022-03-18 12:28:03,075 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1775 GetRequests, 1141 SyntacticMatches, 1 SemanticMatches, 633 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62316 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=133171, Invalid=269419, Unknown=0, NotChecked=0, Total=402590 [2022-03-18 12:28:03,076 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 804 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 1449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1449 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 12:28:03,076 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 82 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1449 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 12:28:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-03-18 12:28:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 622. [2022-03-18 12:28:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 617 states have (on average 1.0502431118314424) internal successors, (648), 617 states have internal predecessors, (648), 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) [2022-03-18 12:28:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 652 transitions. [2022-03-18 12:28:03,093 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 652 transitions. Word has length 587 [2022-03-18 12:28:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:28:03,093 INFO L478 AbstractCegarLoop]: Abstraction has 622 states and 652 transitions. [2022-03-18 12:28:03,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 312 states, 310 states have (on average 2.0129032258064514) internal successors, (624), 310 states have internal predecessors, (624), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:28:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 652 transitions. [2022-03-18 12:28:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-03-18 12:28:03,097 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:28:03,097 INFO L500 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:28:03,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 12:28:03,311 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 [2022-03-18 12:28:03,311 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:28:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:28:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1905068116, now seen corresponding path program 10 times [2022-03-18 12:28:03,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:28:03,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353130544] [2022-03-18 12:28:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:28:03,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:28:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:17,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:28:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 12:28:17,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:28:17,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353130544] [2022-03-18 12:28:17,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353130544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:28:17,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730770367] [2022-03-18 12:28:17,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:28:17,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:28:17,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:28:17,862 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) [2022-03-18 12:28:17,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 12:28:18,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:28:18,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:28:18,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-18 12:28:18,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:28:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 12:28:19,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:28:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 12:28:59,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730770367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:28:59,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:28:59,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-18 12:28:59,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488872964] [2022-03-18 12:28:59,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:28:59,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-18 12:28:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:28:59,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-18 12:28:59,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-18 12:28:59,353 INFO L87 Difference]: Start difference. First operand 622 states and 652 transitions. Second operand has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 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) [2022-03-18 12:30:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:30:07,701 INFO L93 Difference]: Finished difference Result 1240 states and 1576 transitions. [2022-03-18 12:30:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-18 12:30:07,702 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 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 621 [2022-03-18 12:30:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:30:07,719 INFO L225 Difference]: With dead ends: 1240 [2022-03-18 12:30:07,719 INFO L226 Difference]: Without dead ends: 1176 [2022-03-18 12:30:07,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 114.2s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-18 12:30:07,775 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 560 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 12:30:07,775 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 39 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 12:30:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-18 12:30:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-03-18 12:30:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1171 states have (on average 1.026473099914603) internal successors, (1202), 1171 states have internal predecessors, (1202), 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) [2022-03-18 12:30:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1206 transitions. [2022-03-18 12:30:07,803 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1206 transitions. Word has length 621 [2022-03-18 12:30:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:30:07,803 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1206 transitions. [2022-03-18 12:30:07,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 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) [2022-03-18 12:30:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1206 transitions. [2022-03-18 12:30:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2022-03-18 12:30:07,813 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:30:07,813 INFO L500 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:30:07,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-18 12:30:08,030 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 [2022-03-18 12:30:08,031 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:30:08,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:30:08,031 INFO L85 PathProgramCache]: Analyzing trace with hash 143478069, now seen corresponding path program 11 times [2022-03-18 12:30:08,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:30:08,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863510420] [2022-03-18 12:30:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:30:08,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:30:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:31:03,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:31:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:31:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 12:31:03,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:31:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863510420] [2022-03-18 12:31:03,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863510420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:31:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031579021] [2022-03-18 12:31:03,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:31:03,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:31:03,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:31:03,114 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) [2022-03-18 12:31:03,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 12:31:05,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-03-18 12:31:05,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:31:05,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-18 12:31:05,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:31:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 12:31:07,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:33:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 12:33:52,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031579021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:33:52,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:33:52,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-03-18 12:33:52,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714158461] [2022-03-18 12:33:52,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:33:52,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-03-18 12:33:52,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:33:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-03-18 12:33:53,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-03-18 12:33:53,087 INFO L87 Difference]: Start difference. First operand 1176 states and 1206 transitions. Second operand has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 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) [2022-03-18 12:39:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:39,164 INFO L93 Difference]: Finished difference Result 2348 states and 2961 transitions. [2022-03-18 12:39:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1109 states. [2022-03-18 12:39:39,166 INFO L78 Accepts]: Start accepts. Automaton has has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 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 1175 [2022-03-18 12:39:39,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:39,173 INFO L225 Difference]: With dead ends: 2348 [2022-03-18 12:39:39,173 INFO L226 Difference]: Without dead ends: 2284 [2022-03-18 12:39:39,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4012 GetRequests, 1798 SyntacticMatches, 0 SemanticMatches, 2214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767005 ImplicationChecksByTransitivity, 500.2s TimeCoverageRelationStatistics Valid=1840943, Invalid=3067497, Unknown=0, NotChecked=0, Total=4908440 [2022-03-18 12:39:39,488 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 1114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 1672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1672 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:39,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 44 Invalid, 3925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1672 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 12:39:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2022-03-18 12:39:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2284. [2022-03-18 12:39:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2279 states have (on average 1.0136024572180782) internal successors, (2310), 2279 states have internal predecessors, (2310), 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) [2022-03-18 12:39:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2314 transitions. [2022-03-18 12:39:39,723 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2314 transitions. Word has length 1175 [2022-03-18 12:39:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:39,724 INFO L478 AbstractCegarLoop]: Abstraction has 2284 states and 2314 transitions. [2022-03-18 12:39:39,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 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) [2022-03-18 12:39:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2314 transitions. [2022-03-18 12:39:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2284 [2022-03-18 12:39:39,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:39,782 INFO L500 BasicCegarLoop]: trace histogram [1136, 1106, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:39,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:39,995 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 [2022-03-18 12:39:39,995 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash 263760695, now seen corresponding path program 12 times [2022-03-18 12:39:39,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:39,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498319434] [2022-03-18 12:39:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:39,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat