/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:29:34,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:29:34,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:29:34,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:29:34,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:29:34,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:29:34,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:29:34,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:29:34,301 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:29:34,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:29:34,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:29:34,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:29:34,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:29:34,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:29:34,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:29:34,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:29:34,303 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:29:34,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:29:34,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:29:34,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:29:34,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:29:34,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:29:34,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:29:34,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:29:34,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:29:34,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:29:34,305 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:29:34,305 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:29:34,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:29:34,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:29:34,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:29:34,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:29:34,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:29:34,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:29:34,521 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:29:34,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label11.c [2022-01-09 23:29:34,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214ea570a/939266bd1e114265b6f5572fdbda2ed6/FLAG8f2cd1ca7 [2022-01-09 23:29:35,066 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:29:35,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label11.c [2022-01-09 23:29:35,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214ea570a/939266bd1e114265b6f5572fdbda2ed6/FLAG8f2cd1ca7 [2022-01-09 23:29:35,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214ea570a/939266bd1e114265b6f5572fdbda2ed6 [2022-01-09 23:29:35,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:29:35,089 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:29:35,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:29:35,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:29:35,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:29:35,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24bd91fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35, skipping insertion in model container [2022-01-09 23:29:35,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:29:35,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:29:35,629 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label11.c[60283,60296] [2022-01-09 23:29:35,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:29:35,665 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:29:35,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label11.c[60283,60296] [2022-01-09 23:29:35,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:29:35,797 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:29:35,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35 WrapperNode [2022-01-09 23:29:35,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:29:35,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:29:35,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:29:35,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:29:35,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,888 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-01-09 23:29:35,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:29:35,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:29:35,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:29:35,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:29:35,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:29:35,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:29:35,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:29:35,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:29:35,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (1/1) ... [2022-01-09 23:29:35,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:29:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:29:36,013 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) [2022-01-09 23:29:36,018 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 [2022-01-09 23:29:36,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:29:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:29:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:29:36,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:29:36,134 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:29:36,135 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:29:37,250 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:29:37,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:29:37,257 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 23:29:37,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:29:37 BoogieIcfgContainer [2022-01-09 23:29:37,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:29:37,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:29:37,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:29:37,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:29:37,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:29:35" (1/3) ... [2022-01-09 23:29:37,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25222281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:29:37, skipping insertion in model container [2022-01-09 23:29:37,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:29:35" (2/3) ... [2022-01-09 23:29:37,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25222281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:29:37, skipping insertion in model container [2022-01-09 23:29:37,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:29:37" (3/3) ... [2022-01-09 23:29:37,263 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label11.c [2022-01-09 23:29:37,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:29:37,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:29:37,293 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:29:37,297 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 23:29:37,298 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:29:37,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-09 23:29:37,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:37,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:37,320 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash -448621317, now seen corresponding path program 1 times [2022-01-09 23:29:37,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:37,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2235603] [2022-01-09 23:29:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:37,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:29:37,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:37,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2235603] [2022-01-09 23:29:37,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2235603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:37,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:29:37,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:29:37,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010774782] [2022-01-09 23:29:37,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:37,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:37,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:37,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:37,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:29:37,762 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:38,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:38,528 INFO L93 Difference]: Finished difference Result 810 states and 1445 transitions. [2022-01-09 23:29:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2022-01-09 23:29:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:38,541 INFO L225 Difference]: With dead ends: 810 [2022-01-09 23:29:38,541 INFO L226 Difference]: Without dead ends: 444 [2022-01-09 23:29:38,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:29:38,545 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:38,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 231 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:29:38,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-09 23:29:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2022-01-09 23:29:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.4288939051918736) internal successors, (633), 443 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 633 transitions. [2022-01-09 23:29:38,583 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 633 transitions. Word has length 193 [2022-01-09 23:29:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:38,583 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 633 transitions. [2022-01-09 23:29:38,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 633 transitions. [2022-01-09 23:29:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-09 23:29:38,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:38,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:38,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:29:38,589 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1711270716, now seen corresponding path program 1 times [2022-01-09 23:29:38,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:38,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489804593] [2022-01-09 23:29:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:38,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:29:38,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489804593] [2022-01-09 23:29:38,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489804593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:38,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:29:38,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:29:38,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9180781] [2022-01-09 23:29:38,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:38,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:38,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:29:38,660 INFO L87 Difference]: Start difference. First operand 444 states and 633 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:39,262 INFO L93 Difference]: Finished difference Result 1312 states and 1878 transitions. [2022-01-09 23:29:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2022-01-09 23:29:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:39,266 INFO L225 Difference]: With dead ends: 1312 [2022-01-09 23:29:39,266 INFO L226 Difference]: Without dead ends: 870 [2022-01-09 23:29:39,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:29:39,268 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:39,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:29:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-09 23:29:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2022-01-09 23:29:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3953216374269006) internal successors, (1193), 855 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1193 transitions. [2022-01-09 23:29:39,309 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1193 transitions. Word has length 201 [2022-01-09 23:29:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:39,310 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1193 transitions. [2022-01-09 23:29:39,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1193 transitions. [2022-01-09 23:29:39,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-09 23:29:39,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:39,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:39,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:29:39,319 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2070037263, now seen corresponding path program 1 times [2022-01-09 23:29:39,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:39,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779377458] [2022-01-09 23:29:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:39,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:29:39,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:39,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779377458] [2022-01-09 23:29:39,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779377458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:39,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:29:39,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:29:39,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834571028] [2022-01-09 23:29:39,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:39,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:29:39,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:29:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:29:39,595 INFO L87 Difference]: Start difference. First operand 856 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:40,306 INFO L93 Difference]: Finished difference Result 1864 states and 2652 transitions. [2022-01-09 23:29:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:29:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2022-01-09 23:29:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:40,312 INFO L225 Difference]: With dead ends: 1864 [2022-01-09 23:29:40,312 INFO L226 Difference]: Without dead ends: 836 [2022-01-09 23:29:40,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:29:40,319 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:40,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 47 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:29:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-09 23:29:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 836. [2022-01-09 23:29:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 1.2658682634730538) internal successors, (1057), 835 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1057 transitions. [2022-01-09 23:29:40,345 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1057 transitions. Word has length 208 [2022-01-09 23:29:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:40,345 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 1057 transitions. [2022-01-09 23:29:40,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1057 transitions. [2022-01-09 23:29:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-09 23:29:40,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:40,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:40,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:29:40,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:40,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2139349419, now seen corresponding path program 1 times [2022-01-09 23:29:40,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:40,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584566975] [2022-01-09 23:29:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:40,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:29:40,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584566975] [2022-01-09 23:29:40,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584566975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:40,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:29:40,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:29:40,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132957742] [2022-01-09 23:29:40,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:40,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:40,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:29:40,451 INFO L87 Difference]: Start difference. First operand 836 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:40,943 INFO L93 Difference]: Finished difference Result 2494 states and 3156 transitions. [2022-01-09 23:29:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:40,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2022-01-09 23:29:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:40,948 INFO L225 Difference]: With dead ends: 2494 [2022-01-09 23:29:40,948 INFO L226 Difference]: Without dead ends: 1660 [2022-01-09 23:29:40,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:29:40,956 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:40,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 62 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:29:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2022-01-09 23:29:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1654. [2022-01-09 23:29:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 1.2480338777979432) internal successors, (2063), 1653 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2063 transitions. [2022-01-09 23:29:40,977 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2063 transitions. Word has length 221 [2022-01-09 23:29:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:40,977 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 2063 transitions. [2022-01-09 23:29:40,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2063 transitions. [2022-01-09 23:29:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-09 23:29:40,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:40,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:40,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 23:29:40,981 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:40,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1439953932, now seen corresponding path program 1 times [2022-01-09 23:29:40,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:40,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923956492] [2022-01-09 23:29:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:40,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:29:41,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:41,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923956492] [2022-01-09 23:29:41,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923956492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:41,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:29:41,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:29:41,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621811178] [2022-01-09 23:29:41,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:41,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:29:41,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:29:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:29:41,178 INFO L87 Difference]: Start difference. First operand 1654 states and 2063 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:41,843 INFO L93 Difference]: Finished difference Result 4301 states and 5381 transitions. [2022-01-09 23:29:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:29:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-01-09 23:29:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:41,856 INFO L225 Difference]: With dead ends: 4301 [2022-01-09 23:29:41,856 INFO L226 Difference]: Without dead ends: 2475 [2022-01-09 23:29:41,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:29:41,858 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:41,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 124 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:29:41,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-01-09 23:29:41,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2474. [2022-01-09 23:29:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 1.2365547917509099) internal successors, (3058), 2473 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 3058 transitions. [2022-01-09 23:29:41,892 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 3058 transitions. Word has length 224 [2022-01-09 23:29:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:41,893 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 3058 transitions. [2022-01-09 23:29:41,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 3058 transitions. [2022-01-09 23:29:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-09 23:29:41,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:41,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:41,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-09 23:29:41,897 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1990916425, now seen corresponding path program 1 times [2022-01-09 23:29:41,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:41,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848050748] [2022-01-09 23:29:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:41,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:29:42,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848050748] [2022-01-09 23:29:42,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848050748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:29:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131844678] [2022-01-09 23:29:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:42,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:29:42,031 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) [2022-01-09 23:29:42,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:29:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:42,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:29:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:29:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 23:29:42,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:29:42,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131844678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:42,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:29:42,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:29:42,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798429705] [2022-01-09 23:29:42,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:42,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:42,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:42,661 INFO L87 Difference]: Start difference. First operand 2474 states and 3058 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:43,169 INFO L93 Difference]: Finished difference Result 4751 states and 5909 transitions. [2022-01-09 23:29:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-01-09 23:29:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:43,176 INFO L225 Difference]: With dead ends: 4751 [2022-01-09 23:29:43,176 INFO L226 Difference]: Without dead ends: 2279 [2022-01-09 23:29:43,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:43,179 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 31 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:43,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 291 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:29:43,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2022-01-09 23:29:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2271. [2022-01-09 23:29:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 1.2312775330396475) internal successors, (2795), 2270 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 2795 transitions. [2022-01-09 23:29:43,210 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 2795 transitions. Word has length 231 [2022-01-09 23:29:43,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:43,210 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 2795 transitions. [2022-01-09 23:29:43,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 2795 transitions. [2022-01-09 23:29:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-09 23:29:43,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:43,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:43,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-09 23:29:43,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-09 23:29:43,428 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash -185737120, now seen corresponding path program 1 times [2022-01-09 23:29:43,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:43,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676699386] [2022-01-09 23:29:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:43,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-09 23:29:43,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676699386] [2022-01-09 23:29:43,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676699386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:43,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:29:43,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:29:43,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859389923] [2022-01-09 23:29:43,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:43,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:43,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:29:43,501 INFO L87 Difference]: Start difference. First operand 2271 states and 2795 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:44,398 INFO L93 Difference]: Finished difference Result 6796 states and 8367 transitions. [2022-01-09 23:29:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2022-01-09 23:29:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:44,410 INFO L225 Difference]: With dead ends: 6796 [2022-01-09 23:29:44,410 INFO L226 Difference]: Without dead ends: 4527 [2022-01-09 23:29:44,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:29:44,413 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 245 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:44,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 102 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 23:29:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2022-01-09 23:29:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 4522. [2022-01-09 23:29:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 1.2227383322273833) internal successors, (5528), 4521 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 5528 transitions. [2022-01-09 23:29:44,476 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 5528 transitions. Word has length 233 [2022-01-09 23:29:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:44,476 INFO L470 AbstractCegarLoop]: Abstraction has 4522 states and 5528 transitions. [2022-01-09 23:29:44,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 5528 transitions. [2022-01-09 23:29:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-09 23:29:44,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:44,483 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:44,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-09 23:29:44,483 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2020426155, now seen corresponding path program 1 times [2022-01-09 23:29:44,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:44,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354831231] [2022-01-09 23:29:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:44,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:29:44,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:44,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354831231] [2022-01-09 23:29:44,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354831231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:29:44,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140090074] [2022-01-09 23:29:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:44,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:29:44,564 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) [2022-01-09 23:29:44,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:29:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:29:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:29:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:29:44,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:29:44,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140090074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:44,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:29:44,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:29:44,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207630045] [2022-01-09 23:29:44,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:44,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:44,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:44,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:44,971 INFO L87 Difference]: Start difference. First operand 4522 states and 5528 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:45,492 INFO L93 Difference]: Finished difference Result 10867 states and 13528 transitions. [2022-01-09 23:29:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-01-09 23:29:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:45,510 INFO L225 Difference]: With dead ends: 10867 [2022-01-09 23:29:45,510 INFO L226 Difference]: Without dead ends: 6347 [2022-01-09 23:29:45,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:45,516 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 215 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:45,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 337 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:29:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6347 states. [2022-01-09 23:29:45,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6347 to 6343. [2022-01-09 23:29:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 6342 states have (on average 1.161147902869757) internal successors, (7364), 6342 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 7364 transitions. [2022-01-09 23:29:45,701 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 7364 transitions. Word has length 237 [2022-01-09 23:29:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:45,701 INFO L470 AbstractCegarLoop]: Abstraction has 6343 states and 7364 transitions. [2022-01-09 23:29:45,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 7364 transitions. [2022-01-09 23:29:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-09 23:29:45,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:45,711 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:45,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:29:45,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-09 23:29:45,944 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash -974935779, now seen corresponding path program 1 times [2022-01-09 23:29:45,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:45,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034248875] [2022-01-09 23:29:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:45,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 23:29:46,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034248875] [2022-01-09 23:29:46,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034248875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:29:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835653448] [2022-01-09 23:29:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:46,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:29:46,017 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) [2022-01-09 23:29:46,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:29:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:46,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:29:46,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:29:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-09 23:29:46,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:29:46,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835653448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:46,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:29:46,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:29:46,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567851027] [2022-01-09 23:29:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:46,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:46,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:46,498 INFO L87 Difference]: Start difference. First operand 6343 states and 7364 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:47,043 INFO L93 Difference]: Finished difference Result 17988 states and 20975 transitions. [2022-01-09 23:29:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:47,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2022-01-09 23:29:47,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:47,071 INFO L225 Difference]: With dead ends: 17988 [2022-01-09 23:29:47,071 INFO L226 Difference]: Without dead ends: 12053 [2022-01-09 23:29:47,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:47,081 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:47,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 129 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:29:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12053 states. [2022-01-09 23:29:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12053 to 12049. [2022-01-09 23:29:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12049 states, 12048 states have (on average 1.1509794156706508) internal successors, (13867), 12048 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12049 states to 12049 states and 13867 transitions. [2022-01-09 23:29:47,297 INFO L78 Accepts]: Start accepts. Automaton has 12049 states and 13867 transitions. Word has length 241 [2022-01-09 23:29:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:47,297 INFO L470 AbstractCegarLoop]: Abstraction has 12049 states and 13867 transitions. [2022-01-09 23:29:47,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 12049 states and 13867 transitions. [2022-01-09 23:29:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-09 23:29:47,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:47,310 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:47,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:29:47,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:47,520 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash -487881760, now seen corresponding path program 1 times [2022-01-09 23:29:47,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:47,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797246289] [2022-01-09 23:29:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:47,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-09 23:29:47,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797246289] [2022-01-09 23:29:47,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797246289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:29:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681175447] [2022-01-09 23:29:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:47,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:47,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:29:47,600 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) [2022-01-09 23:29:47,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:29:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:29:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:29:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-09 23:29:48,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:29:48,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681175447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:48,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:29:48,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:29:48,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769759854] [2022-01-09 23:29:48,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:48,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:48,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:48,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:48,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:48,257 INFO L87 Difference]: Start difference. First operand 12049 states and 13867 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:48,819 INFO L93 Difference]: Finished difference Result 34485 states and 39656 transitions. [2022-01-09 23:29:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:48,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2022-01-09 23:29:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:48,848 INFO L225 Difference]: With dead ends: 34485 [2022-01-09 23:29:48,848 INFO L226 Difference]: Without dead ends: 22844 [2022-01-09 23:29:48,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:48,955 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:48,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 121 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:29:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22844 states. [2022-01-09 23:29:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22844 to 21196. [2022-01-09 23:29:49,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21196 states, 21195 states have (on average 1.150129747581977) internal successors, (24377), 21195 states have internal predecessors, (24377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21196 states to 21196 states and 24377 transitions. [2022-01-09 23:29:49,177 INFO L78 Accepts]: Start accepts. Automaton has 21196 states and 24377 transitions. Word has length 265 [2022-01-09 23:29:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:49,178 INFO L470 AbstractCegarLoop]: Abstraction has 21196 states and 24377 transitions. [2022-01-09 23:29:49,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 21196 states and 24377 transitions. [2022-01-09 23:29:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-09 23:29:49,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:49,197 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:49,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:29:49,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:49,415 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:49,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash -250647890, now seen corresponding path program 2 times [2022-01-09 23:29:49,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:49,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048750155] [2022-01-09 23:29:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:49,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 23:29:49,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:49,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048750155] [2022-01-09 23:29:49,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048750155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:49,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:29:49,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:29:49,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934726150] [2022-01-09 23:29:49,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:49,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:29:49,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:29:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:29:49,489 INFO L87 Difference]: Start difference. First operand 21196 states and 24377 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:50,311 INFO L93 Difference]: Finished difference Result 71656 states and 82379 transitions. [2022-01-09 23:29:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:29:50,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2022-01-09 23:29:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:50,393 INFO L225 Difference]: With dead ends: 71656 [2022-01-09 23:29:50,393 INFO L226 Difference]: Without dead ends: 51274 [2022-01-09 23:29:50,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:29:50,422 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 492 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:50,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 315 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:29:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51274 states. [2022-01-09 23:29:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51274 to 41092. [2022-01-09 23:29:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41092 states, 41091 states have (on average 1.1459200311503737) internal successors, (47087), 41091 states have internal predecessors, (47087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41092 states to 41092 states and 47087 transitions. [2022-01-09 23:29:51,146 INFO L78 Accepts]: Start accepts. Automaton has 41092 states and 47087 transitions. Word has length 265 [2022-01-09 23:29:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:51,146 INFO L470 AbstractCegarLoop]: Abstraction has 41092 states and 47087 transitions. [2022-01-09 23:29:51,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 41092 states and 47087 transitions. [2022-01-09 23:29:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-09 23:29:51,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:51,179 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:51,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-09 23:29:51,179 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:51,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash 755725242, now seen corresponding path program 1 times [2022-01-09 23:29:51,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:51,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145156454] [2022-01-09 23:29:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:51,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-09 23:29:51,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145156454] [2022-01-09 23:29:51,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145156454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:29:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982014090] [2022-01-09 23:29:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:51,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:51,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:29:51,265 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) [2022-01-09 23:29:51,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:29:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:51,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:29:51,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:29:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-09 23:29:51,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:29:51,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982014090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:51,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:29:51,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:29:51,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516331858] [2022-01-09 23:29:51,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:51,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:51,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:51,764 INFO L87 Difference]: Start difference. First operand 41092 states and 47087 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:52,589 INFO L93 Difference]: Finished difference Result 102304 states and 117512 transitions. [2022-01-09 23:29:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:52,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2022-01-09 23:29:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:52,678 INFO L225 Difference]: With dead ends: 102304 [2022-01-09 23:29:52,678 INFO L226 Difference]: Without dead ends: 62026 [2022-01-09 23:29:52,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:52,831 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 200 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:52,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 302 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 23:29:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62026 states. [2022-01-09 23:29:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62026 to 61203. [2022-01-09 23:29:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61203 states, 61202 states have (on average 1.1341949609489885) internal successors, (69415), 61202 states have internal predecessors, (69415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61203 states to 61203 states and 69415 transitions. [2022-01-09 23:29:53,683 INFO L78 Accepts]: Start accepts. Automaton has 61203 states and 69415 transitions. Word has length 293 [2022-01-09 23:29:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:53,685 INFO L470 AbstractCegarLoop]: Abstraction has 61203 states and 69415 transitions. [2022-01-09 23:29:53,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 61203 states and 69415 transitions. [2022-01-09 23:29:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-01-09 23:29:53,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:53,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:53,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 23:29:53,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-09 23:29:53,940 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:53,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1453183147, now seen corresponding path program 1 times [2022-01-09 23:29:53,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:53,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025881164] [2022-01-09 23:29:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:53,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-01-09 23:29:54,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:54,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025881164] [2022-01-09 23:29:54,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025881164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:29:54,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388173923] [2022-01-09 23:29:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:54,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:29:54,042 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) [2022-01-09 23:29:54,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:29:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:54,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:29:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:29:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-09 23:29:54,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:29:54,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388173923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:54,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:29:54,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:29:54,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743134200] [2022-01-09 23:29:54,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:54,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:54,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:54,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:54,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:54,875 INFO L87 Difference]: Start difference. First operand 61203 states and 69415 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:55,722 INFO L93 Difference]: Finished difference Result 121395 states and 137769 transitions. [2022-01-09 23:29:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2022-01-09 23:29:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:55,813 INFO L225 Difference]: With dead ends: 121395 [2022-01-09 23:29:55,813 INFO L226 Difference]: Without dead ends: 61006 [2022-01-09 23:29:55,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:55,856 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 70 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:55,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 277 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:29:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61006 states. [2022-01-09 23:29:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61006 to 61000. [2022-01-09 23:29:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61000 states, 60999 states have (on average 1.1283955474679912) internal successors, (68831), 60999 states have internal predecessors, (68831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61000 states to 61000 states and 68831 transitions. [2022-01-09 23:29:56,739 INFO L78 Accepts]: Start accepts. Automaton has 61000 states and 68831 transitions. Word has length 304 [2022-01-09 23:29:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:56,740 INFO L470 AbstractCegarLoop]: Abstraction has 61000 states and 68831 transitions. [2022-01-09 23:29:56,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 61000 states and 68831 transitions. [2022-01-09 23:29:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-01-09 23:29:56,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:29:56,911 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:29:56,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-09 23:29:57,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:57,112 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:29:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:29:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2079191557, now seen corresponding path program 1 times [2022-01-09 23:29:57,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:29:57,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209466793] [2022-01-09 23:29:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:57,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:29:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-01-09 23:29:57,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:29:57,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209466793] [2022-01-09 23:29:57,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209466793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:29:57,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825671987] [2022-01-09 23:29:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:29:57,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:29:57,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:29:57,236 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) [2022-01-09 23:29:57,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:29:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:29:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:29:57,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:29:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-09 23:29:57,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:29:57,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825671987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:29:57,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:29:57,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:29:57,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484021452] [2022-01-09 23:29:57,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:29:57,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:29:57,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:29:57,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:29:57,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:57,952 INFO L87 Difference]: Start difference. First operand 61000 states and 68831 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:29:58,788 INFO L93 Difference]: Finished difference Result 115289 states and 130059 transitions. [2022-01-09 23:29:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:29:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2022-01-09 23:29:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:29:58,851 INFO L225 Difference]: With dead ends: 115289 [2022-01-09 23:29:58,852 INFO L226 Difference]: Without dead ends: 55103 [2022-01-09 23:29:58,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:29:58,894 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 171 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:29:58,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 304 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:29:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55103 states. [2022-01-09 23:29:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55103 to 55101. [2022-01-09 23:29:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55101 states, 55100 states have (on average 1.1064609800362977) internal successors, (60966), 55100 states have internal predecessors, (60966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:59,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55101 states to 55101 states and 60966 transitions. [2022-01-09 23:29:59,815 INFO L78 Accepts]: Start accepts. Automaton has 55101 states and 60966 transitions. Word has length 332 [2022-01-09 23:29:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:29:59,815 INFO L470 AbstractCegarLoop]: Abstraction has 55101 states and 60966 transitions. [2022-01-09 23:29:59,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:29:59,815 INFO L276 IsEmpty]: Start isEmpty. Operand 55101 states and 60966 transitions. [2022-01-09 23:30:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-01-09 23:30:00,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:00,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:00,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:30:00,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:00,217 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:00,218 INFO L85 PathProgramCache]: Analyzing trace with hash -868985159, now seen corresponding path program 1 times [2022-01-09 23:30:00,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:00,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131136244] [2022-01-09 23:30:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:00,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:00,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:00,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131136244] [2022-01-09 23:30:00,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131136244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:00,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:00,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:00,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441454411] [2022-01-09 23:30:00,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:00,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:00,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:00,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:00,376 INFO L87 Difference]: Start difference. First operand 55101 states and 60966 transitions. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:01,217 INFO L93 Difference]: Finished difference Result 116728 states and 129412 transitions. [2022-01-09 23:30:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:01,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2022-01-09 23:30:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:01,293 INFO L225 Difference]: With dead ends: 116728 [2022-01-09 23:30:01,293 INFO L226 Difference]: Without dead ends: 63050 [2022-01-09 23:30:01,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:01,320 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 92 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:01,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 136 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63050 states. [2022-01-09 23:30:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63050 to 62640. [2022-01-09 23:30:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62640 states, 62639 states have (on average 1.1035616788262903) internal successors, (69126), 62639 states have internal predecessors, (69126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62640 states to 62640 states and 69126 transitions. [2022-01-09 23:30:02,252 INFO L78 Accepts]: Start accepts. Automaton has 62640 states and 69126 transitions. Word has length 332 [2022-01-09 23:30:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:02,252 INFO L470 AbstractCegarLoop]: Abstraction has 62640 states and 69126 transitions. [2022-01-09 23:30:02,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 62640 states and 69126 transitions. [2022-01-09 23:30:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-01-09 23:30:02,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:02,292 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:02,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-09 23:30:02,293 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2073626625, now seen corresponding path program 1 times [2022-01-09 23:30:02,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:02,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290147436] [2022-01-09 23:30:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:02,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-09 23:30:02,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:02,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290147436] [2022-01-09 23:30:02,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290147436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:02,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:02,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:30:02,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679808933] [2022-01-09 23:30:02,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:02,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:30:02,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:02,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:30:02,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:30:02,534 INFO L87 Difference]: Start difference. First operand 62640 states and 69126 transitions. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:03,742 INFO L93 Difference]: Finished difference Result 123054 states and 135961 transitions. [2022-01-09 23:30:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:30:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2022-01-09 23:30:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:03,835 INFO L225 Difference]: With dead ends: 123054 [2022-01-09 23:30:03,836 INFO L226 Difference]: Without dead ends: 67951 [2022-01-09 23:30:03,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:30:03,855 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 355 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:03,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 102 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:30:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67951 states. [2022-01-09 23:30:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67951 to 67928. [2022-01-09 23:30:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67928 states, 67927 states have (on average 1.0994891574778807) internal successors, (74685), 67927 states have internal predecessors, (74685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67928 states to 67928 states and 74685 transitions. [2022-01-09 23:30:04,807 INFO L78 Accepts]: Start accepts. Automaton has 67928 states and 74685 transitions. Word has length 338 [2022-01-09 23:30:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:04,807 INFO L470 AbstractCegarLoop]: Abstraction has 67928 states and 74685 transitions. [2022-01-09 23:30:04,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 67928 states and 74685 transitions. [2022-01-09 23:30:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-09 23:30:04,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:04,848 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:04,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-09 23:30:04,849 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:04,849 INFO L85 PathProgramCache]: Analyzing trace with hash -131180096, now seen corresponding path program 1 times [2022-01-09 23:30:04,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:04,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342757946] [2022-01-09 23:30:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:04,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-09 23:30:04,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:04,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342757946] [2022-01-09 23:30:04,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342757946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:04,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096448201] [2022-01-09 23:30:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:04,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:04,962 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) [2022-01-09 23:30:04,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:30:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:05,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:30:05,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 145 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:30:05,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:30:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 145 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:30:06,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096448201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:30:06,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:30:06,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-09 23:30:06,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171903580] [2022-01-09 23:30:06,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:30:06,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-09 23:30:06,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-09 23:30:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:30:06,364 INFO L87 Difference]: Start difference. First operand 67928 states and 74685 transitions. Second operand has 6 states, 6 states have (on average 62.333333333333336) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:08,587 INFO L93 Difference]: Finished difference Result 193427 states and 213456 transitions. [2022-01-09 23:30:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:30:08,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 62.333333333333336) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2022-01-09 23:30:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:08,905 INFO L225 Difference]: With dead ends: 193427 [2022-01-09 23:30:08,905 INFO L226 Difference]: Without dead ends: 133442 [2022-01-09 23:30:08,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:30:08,925 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2327 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2327 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:08,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2327 Valid, 154 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-09 23:30:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133442 states. [2022-01-09 23:30:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133442 to 133385. [2022-01-09 23:30:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133385 states, 133384 states have (on average 1.0976353985485516) internal successors, (146407), 133384 states have internal predecessors, (146407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133385 states to 133385 states and 146407 transitions. [2022-01-09 23:30:11,138 INFO L78 Accepts]: Start accepts. Automaton has 133385 states and 146407 transitions. Word has length 339 [2022-01-09 23:30:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:11,140 INFO L470 AbstractCegarLoop]: Abstraction has 133385 states and 146407 transitions. [2022-01-09 23:30:11,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.333333333333336) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 133385 states and 146407 transitions. [2022-01-09 23:30:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-09 23:30:11,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:11,198 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:11,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 23:30:11,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-09 23:30:11,412 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:11,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:11,412 INFO L85 PathProgramCache]: Analyzing trace with hash -386022516, now seen corresponding path program 1 times [2022-01-09 23:30:11,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:11,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883552965] [2022-01-09 23:30:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:11,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 182 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-09 23:30:11,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:11,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883552965] [2022-01-09 23:30:11,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883552965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:11,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712596370] [2022-01-09 23:30:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:11,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:11,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:11,532 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) [2022-01-09 23:30:11,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:30:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:11,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:30:11,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-09 23:30:12,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:12,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712596370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:12,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:12,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-09 23:30:12,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843365515] [2022-01-09 23:30:12,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:12,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:12,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:12,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:12,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:12,054 INFO L87 Difference]: Start difference. First operand 133385 states and 146407 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:13,419 INFO L93 Difference]: Finished difference Result 373693 states and 410617 transitions. [2022-01-09 23:30:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2022-01-09 23:30:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:13,842 INFO L225 Difference]: With dead ends: 373693 [2022-01-09 23:30:13,843 INFO L226 Difference]: Without dead ends: 241731 [2022-01-09 23:30:14,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:14,279 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 185 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:14,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 485 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:30:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241731 states. [2022-01-09 23:30:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241731 to 209416. [2022-01-09 23:30:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209416 states, 209415 states have (on average 1.0990855478356374) internal successors, (230165), 209415 states have internal predecessors, (230165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209416 states to 209416 states and 230165 transitions. [2022-01-09 23:30:18,101 INFO L78 Accepts]: Start accepts. Automaton has 209416 states and 230165 transitions. Word has length 366 [2022-01-09 23:30:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:18,102 INFO L470 AbstractCegarLoop]: Abstraction has 209416 states and 230165 transitions. [2022-01-09 23:30:18,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 209416 states and 230165 transitions. [2022-01-09 23:30:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-09 23:30:18,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:18,167 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:18,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:30:18,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-09 23:30:18,384 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash -740097569, now seen corresponding path program 1 times [2022-01-09 23:30:18,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:18,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499983423] [2022-01-09 23:30:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:18,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:30:18,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:18,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499983423] [2022-01-09 23:30:18,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499983423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:18,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:18,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:30:18,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943053347] [2022-01-09 23:30:18,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:18,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:18,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:18,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:18,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:18,483 INFO L87 Difference]: Start difference. First operand 209416 states and 230165 transitions. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:20,267 INFO L93 Difference]: Finished difference Result 445833 states and 489116 transitions. [2022-01-09 23:30:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:20,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 368 [2022-01-09 23:30:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:20,757 INFO L225 Difference]: With dead ends: 445833 [2022-01-09 23:30:20,758 INFO L226 Difference]: Without dead ends: 237434 [2022-01-09 23:30:20,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:20,895 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 211 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:20,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 305 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237434 states. [2022-01-09 23:30:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237434 to 190523. [2022-01-09 23:30:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190523 states, 190522 states have (on average 1.083339456860625) internal successors, (206400), 190522 states have internal predecessors, (206400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190523 states to 190523 states and 206400 transitions. [2022-01-09 23:30:24,003 INFO L78 Accepts]: Start accepts. Automaton has 190523 states and 206400 transitions. Word has length 368 [2022-01-09 23:30:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:24,003 INFO L470 AbstractCegarLoop]: Abstraction has 190523 states and 206400 transitions. [2022-01-09 23:30:24,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 190523 states and 206400 transitions. [2022-01-09 23:30:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-01-09 23:30:24,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:24,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:24,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-09 23:30:24,435 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1930289690, now seen corresponding path program 1 times [2022-01-09 23:30:24,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:24,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804391504] [2022-01-09 23:30:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:24,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-01-09 23:30:24,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:24,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804391504] [2022-01-09 23:30:24,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804391504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:24,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:24,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:24,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639317918] [2022-01-09 23:30:24,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:24,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:24,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:24,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:24,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:24,515 INFO L87 Difference]: Start difference. First operand 190523 states and 206400 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:26,523 INFO L93 Difference]: Finished difference Result 428011 states and 462972 transitions. [2022-01-09 23:30:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:26,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2022-01-09 23:30:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:27,066 INFO L225 Difference]: With dead ends: 428011 [2022-01-09 23:30:27,066 INFO L226 Difference]: Without dead ends: 238302 [2022-01-09 23:30:27,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:27,185 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 205 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:27,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 138 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 23:30:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238302 states. [2022-01-09 23:30:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238302 to 226906. [2022-01-09 23:30:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226906 states, 226905 states have (on average 1.0810118772173376) internal successors, (245287), 226905 states have internal predecessors, (245287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226906 states to 226906 states and 245287 transitions. [2022-01-09 23:30:31,709 INFO L78 Accepts]: Start accepts. Automaton has 226906 states and 245287 transitions. Word has length 429 [2022-01-09 23:30:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:31,710 INFO L470 AbstractCegarLoop]: Abstraction has 226906 states and 245287 transitions. [2022-01-09 23:30:31,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 226906 states and 245287 transitions. [2022-01-09 23:30:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-01-09 23:30:31,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:31,916 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:31,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-09 23:30:31,917 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:31,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1673749673, now seen corresponding path program 1 times [2022-01-09 23:30:31,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:31,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577964966] [2022-01-09 23:30:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:31,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 310 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-01-09 23:30:32,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:32,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577964966] [2022-01-09 23:30:32,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577964966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:32,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680900243] [2022-01-09 23:30:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:32,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:32,260 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) [2022-01-09 23:30:32,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:30:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:32,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:30:32,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-01-09 23:30:33,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:33,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680900243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:33,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:33,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-01-09 23:30:33,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342304838] [2022-01-09 23:30:33,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:33,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:33,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:33,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:33,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:30:33,217 INFO L87 Difference]: Start difference. First operand 226906 states and 245287 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 2 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:35,697 INFO L93 Difference]: Finished difference Result 626267 states and 676053 transitions. [2022-01-09 23:30:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 2 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 467 [2022-01-09 23:30:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted.