/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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:31:28,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:31:28,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:31:28,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:31:28,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:31:28,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:31:28,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:31:28,743 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 23:31:28,768 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:31:28,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:31:28,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:31:28,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:31:28,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:31:28,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:31:28,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:31:28,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:31:28,770 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:31:28,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:31:28,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:31:28,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:31:28,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:31:28,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:31:28,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:31:28,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:31:28,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:31:28,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:31:28,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:31:28,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:31:28,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:31:28,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:31:28,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:31:28,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:31:28,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:31:28,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:31:28,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:31:28,774 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:31:28,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:31:28,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:31:28,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:31:28,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:31:28,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:31:28,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:31:28,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:31:28,990 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:31:28,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2022-01-09 23:31:29,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2df2e14a/e4e2d1bb8a594d00864e7cb1d86e572e/FLAG148fb2ffc [2022-01-09 23:31:29,546 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:31:29,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2022-01-09 23:31:29,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2df2e14a/e4e2d1bb8a594d00864e7cb1d86e572e/FLAG148fb2ffc [2022-01-09 23:31:29,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2df2e14a/e4e2d1bb8a594d00864e7cb1d86e572e [2022-01-09 23:31:29,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:31:29,834 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:31:29,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:31:29,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:31:29,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:31:29,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:31:29" (1/1) ... [2022-01-09 23:31:29,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cb93b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:29, skipping insertion in model container [2022-01-09 23:31:29,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:31:29" (1/1) ... [2022-01-09 23:31:29,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:31:29,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:31:30,326 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_label34.c[59879,59892] [2022-01-09 23:31:30,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:31:30,361 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:31:30,488 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_label34.c[59879,59892] [2022-01-09 23:31:30,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:31:30,508 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:31:30,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30 WrapperNode [2022-01-09 23:31:30,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:31:30,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:31:30,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:31:30,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:31:30,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,611 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-01-09 23:31:30,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:31:30,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:31:30,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:31:30,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:31:30,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:31:30,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:31:30,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:31:30,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:31:30,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (1/1) ... [2022-01-09 23:31:30,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:31:30,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:30,719 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 23:31:30,721 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 23:31:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:31:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:31:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:31:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:31:30,853 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:31:30,855 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:31:31,943 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:31:31,954 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:31:31,955 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 23:31:31,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:31:31 BoogieIcfgContainer [2022-01-09 23:31:31,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:31:31,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:31:31,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:31:31,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:31:31,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:31:29" (1/3) ... [2022-01-09 23:31:31,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2b620c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:31:31, skipping insertion in model container [2022-01-09 23:31:31,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:31:30" (2/3) ... [2022-01-09 23:31:31,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2b620c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:31:31, skipping insertion in model container [2022-01-09 23:31:31,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:31:31" (3/3) ... [2022-01-09 23:31:31,963 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label34.c [2022-01-09 23:31:31,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:31:31,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:31:32,013 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:31:32,018 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 23:31:32,019 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:31:32,039 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 23:31:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-09 23:31:32,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:32,051 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] [2022-01-09 23:31:32,051 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:32,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:32,055 INFO L85 PathProgramCache]: Analyzing trace with hash -502159206, now seen corresponding path program 1 times [2022-01-09 23:31:32,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:32,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916875562] [2022-01-09 23:31:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:32,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:32,504 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 23:31:32,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:32,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916875562] [2022-01-09 23:31:32,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916875562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:32,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:32,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:31:32,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266504235] [2022-01-09 23:31:32,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:32,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:32,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:32,539 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 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 23:31:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:33,364 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2022-01-09 23:31:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:33,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 190 [2022-01-09 23:31:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:33,380 INFO L225 Difference]: With dead ends: 857 [2022-01-09 23:31:33,380 INFO L226 Difference]: Without dead ends: 462 [2022-01-09 23:31:33,384 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 23:31:33,386 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 98 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:33,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 23:31:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-09 23:31:33,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-01-09 23:31:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 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 23:31:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2022-01-09 23:31:33,426 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 190 [2022-01-09 23:31:33,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:33,427 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2022-01-09 23:31:33,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 23:31:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2022-01-09 23:31:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-09 23:31:33,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:33,430 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] [2022-01-09 23:31:33,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:31:33,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:33,431 INFO L85 PathProgramCache]: Analyzing trace with hash 604561913, now seen corresponding path program 1 times [2022-01-09 23:31:33,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:33,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705429969] [2022-01-09 23:31:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:33,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:33,486 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 23:31:33,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:33,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705429969] [2022-01-09 23:31:33,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705429969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:33,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:33,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:31:33,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010246156] [2022-01-09 23:31:33,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:33,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:33,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:33,489 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 23:31:34,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:34,077 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2022-01-09 23:31:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:34,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 198 [2022-01-09 23:31:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:34,080 INFO L225 Difference]: With dead ends: 1344 [2022-01-09 23:31:34,081 INFO L226 Difference]: Without dead ends: 886 [2022-01-09 23:31:34,082 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 23:31:34,083 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 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 23:31:34,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:31:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-09 23:31:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2022-01-09 23:31:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 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 23:31:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2022-01-09 23:31:34,103 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 198 [2022-01-09 23:31:34,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:34,103 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2022-01-09 23:31:34,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 23:31:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2022-01-09 23:31:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-09 23:31:34,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:34,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:34,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:31:34,109 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:34,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1989171232, now seen corresponding path program 1 times [2022-01-09 23:31:34,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:34,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899440120] [2022-01-09 23:31:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:34,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:31:34,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:34,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899440120] [2022-01-09 23:31:34,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899440120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:34,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:34,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:34,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225413278] [2022-01-09 23:31:34,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:34,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:34,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:34,172 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 23:31:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:34,861 INFO L93 Difference]: Finished difference Result 2554 states and 3869 transitions. [2022-01-09 23:31:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:34,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 210 [2022-01-09 23:31:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:34,866 INFO L225 Difference]: With dead ends: 2554 [2022-01-09 23:31:34,866 INFO L226 Difference]: Without dead ends: 1686 [2022-01-09 23:31:34,867 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 23:31:34,868 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 232 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:34,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 417 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:31:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-01-09 23:31:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1684. [2022-01-09 23:31:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.3363042186571599) internal successors, (2249), 1683 states have internal predecessors, (2249), 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 23:31:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2249 transitions. [2022-01-09 23:31:34,893 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2249 transitions. Word has length 210 [2022-01-09 23:31:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:34,893 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2249 transitions. [2022-01-09 23:31:34,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 23:31:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2249 transitions. [2022-01-09 23:31:34,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-09 23:31:34,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:34,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:34,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:31:34,897 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:34,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1472580547, now seen corresponding path program 1 times [2022-01-09 23:31:34,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:34,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665026900] [2022-01-09 23:31:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:34,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:31:34,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:34,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665026900] [2022-01-09 23:31:34,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665026900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:34,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:34,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:31:34,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884246351] [2022-01-09 23:31:34,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:34,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:34,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:34,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:34,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:34,973 INFO L87 Difference]: Start difference. First operand 1684 states and 2249 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 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 23:31:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:35,518 INFO L93 Difference]: Finished difference Result 5017 states and 6707 transitions. [2022-01-09 23:31:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 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 213 [2022-01-09 23:31:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:35,528 INFO L225 Difference]: With dead ends: 5017 [2022-01-09 23:31:35,528 INFO L226 Difference]: Without dead ends: 3335 [2022-01-09 23:31:35,531 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 23:31:35,538 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:35,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:31:35,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2022-01-09 23:31:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3326. [2022-01-09 23:31:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.3230075187969925) internal successors, (4399), 3325 states have internal predecessors, (4399), 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 23:31:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4399 transitions. [2022-01-09 23:31:35,592 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4399 transitions. Word has length 213 [2022-01-09 23:31:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:35,592 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 4399 transitions. [2022-01-09 23:31:35,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 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 23:31:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4399 transitions. [2022-01-09 23:31:35,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-09 23:31:35,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:35,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:35,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 23:31:35,599 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -909021787, now seen corresponding path program 1 times [2022-01-09 23:31:35,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:35,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630350348] [2022-01-09 23:31:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:35,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:31:35,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:35,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630350348] [2022-01-09 23:31:35,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630350348] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:35,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:35,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:31:35,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011061377] [2022-01-09 23:31:35,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:35,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:35,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:35,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:35,705 INFO L87 Difference]: Start difference. First operand 3326 states and 4399 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 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 23:31:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:36,319 INFO L93 Difference]: Finished difference Result 9928 states and 13145 transitions. [2022-01-09 23:31:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:36,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 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 216 [2022-01-09 23:31:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:36,339 INFO L225 Difference]: With dead ends: 9928 [2022-01-09 23:31:36,339 INFO L226 Difference]: Without dead ends: 6604 [2022-01-09 23:31:36,344 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 23:31:36,345 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 219 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:36,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 167 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:31:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2022-01-09 23:31:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 5768. [2022-01-09 23:31:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5768 states, 5767 states have (on average 1.3370903415987516) internal successors, (7711), 5767 states have internal predecessors, (7711), 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 23:31:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5768 states to 5768 states and 7711 transitions. [2022-01-09 23:31:36,452 INFO L78 Accepts]: Start accepts. Automaton has 5768 states and 7711 transitions. Word has length 216 [2022-01-09 23:31:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:36,452 INFO L470 AbstractCegarLoop]: Abstraction has 5768 states and 7711 transitions. [2022-01-09 23:31:36,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 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 23:31:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 5768 states and 7711 transitions. [2022-01-09 23:31:36,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-09 23:31:36,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:36,462 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:36,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-09 23:31:36,463 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash -455322744, now seen corresponding path program 1 times [2022-01-09 23:31:36,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:36,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450884239] [2022-01-09 23:31:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:36,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:31:36,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:36,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450884239] [2022-01-09 23:31:36,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450884239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:36,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:36,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:36,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272186638] [2022-01-09 23:31:36,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:36,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:36,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:36,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:36,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:36,537 INFO L87 Difference]: Start difference. First operand 5768 states and 7711 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 23:31:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:37,165 INFO L93 Difference]: Finished difference Result 14591 states and 19420 transitions. [2022-01-09 23:31:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 225 [2022-01-09 23:31:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:37,192 INFO L225 Difference]: With dead ends: 14591 [2022-01-09 23:31:37,192 INFO L226 Difference]: Without dead ends: 8825 [2022-01-09 23:31:37,199 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 23:31:37,200 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:37,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 421 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:31:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2022-01-09 23:31:37,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8821. [2022-01-09 23:31:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 8820 states have (on average 1.2786848072562358) internal successors, (11278), 8820 states have internal predecessors, (11278), 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 23:31:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 11278 transitions. [2022-01-09 23:31:37,353 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 11278 transitions. Word has length 225 [2022-01-09 23:31:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:37,353 INFO L470 AbstractCegarLoop]: Abstraction has 8821 states and 11278 transitions. [2022-01-09 23:31:37,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 23:31:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 11278 transitions. [2022-01-09 23:31:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-09 23:31:37,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:37,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:37,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-09 23:31:37,366 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash -434828922, now seen corresponding path program 1 times [2022-01-09 23:31:37,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:37,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10197566] [2022-01-09 23:31:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:37,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:31:37,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:37,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10197566] [2022-01-09 23:31:37,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10197566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:37,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544751008] [2022-01-09 23:31:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:37,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:37,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:37,460 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 23:31:37,488 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 23:31:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:37,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:31:37,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 23:31:37,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:31:37,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544751008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:37,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:31:37,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-09 23:31:37,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160140888] [2022-01-09 23:31:37,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:37,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:37,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:37,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:31:37,971 INFO L87 Difference]: Start difference. First operand 8821 states and 11278 transitions. 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 23:31:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:38,587 INFO L93 Difference]: Finished difference Result 22147 states and 28843 transitions. [2022-01-09 23:31:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:38,587 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 227 [2022-01-09 23:31:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:38,614 INFO L225 Difference]: With dead ends: 22147 [2022-01-09 23:31:38,614 INFO L226 Difference]: Without dead ends: 13328 [2022-01-09 23:31:38,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 226 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 23:31:38,626 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 79 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:38,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 134 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:31:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13328 states. [2022-01-09 23:31:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13328 to 13316. [2022-01-09 23:31:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13316 states, 13315 states have (on average 1.282838903492302) internal successors, (17081), 13315 states have internal predecessors, (17081), 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 23:31:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13316 states to 13316 states and 17081 transitions. [2022-01-09 23:31:38,822 INFO L78 Accepts]: Start accepts. Automaton has 13316 states and 17081 transitions. Word has length 227 [2022-01-09 23:31:38,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:38,822 INFO L470 AbstractCegarLoop]: Abstraction has 13316 states and 17081 transitions. [2022-01-09 23:31:38,823 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 23:31:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 13316 states and 17081 transitions. [2022-01-09 23:31:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-09 23:31:38,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:38,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:38,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:31:39,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:39,056 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:39,056 INFO L85 PathProgramCache]: Analyzing trace with hash -903632663, now seen corresponding path program 1 times [2022-01-09 23:31:39,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:39,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004876919] [2022-01-09 23:31:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:39,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:31:39,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:39,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004876919] [2022-01-09 23:31:39,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004876919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:39,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:39,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:31:39,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694496457] [2022-01-09 23:31:39,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:39,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:39,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:39,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:39,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:39,119 INFO L87 Difference]: Start difference. First operand 13316 states and 17081 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 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 23:31:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:39,784 INFO L93 Difference]: Finished difference Result 31753 states and 40754 transitions. [2022-01-09 23:31:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 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 23:31:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:39,814 INFO L225 Difference]: With dead ends: 31753 [2022-01-09 23:31:39,814 INFO L226 Difference]: Without dead ends: 18439 [2022-01-09 23:31:39,828 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 23:31:39,829 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 197 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:39,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 175 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:31:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18439 states. [2022-01-09 23:31:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18439 to 18421. [2022-01-09 23:31:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18421 states, 18420 states have (on average 1.2747557003257328) internal successors, (23481), 18420 states have internal predecessors, (23481), 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 23:31:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18421 states to 18421 states and 23481 transitions. [2022-01-09 23:31:40,085 INFO L78 Accepts]: Start accepts. Automaton has 18421 states and 23481 transitions. Word has length 231 [2022-01-09 23:31:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:40,085 INFO L470 AbstractCegarLoop]: Abstraction has 18421 states and 23481 transitions. [2022-01-09 23:31:40,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 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 23:31:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 18421 states and 23481 transitions. [2022-01-09 23:31:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-09 23:31:40,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:40,108 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, 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] [2022-01-09 23:31:40,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-09 23:31:40,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash 202592222, now seen corresponding path program 1 times [2022-01-09 23:31:40,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:40,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652102922] [2022-01-09 23:31:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:40,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:31:40,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652102922] [2022-01-09 23:31:40,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652102922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026717168] [2022-01-09 23:31:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:40,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:40,196 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 23:31:40,197 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 23:31:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:40,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:31:40,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:31:40,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:31:40,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026717168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:40,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:31:40,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:31:40,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814778776] [2022-01-09 23:31:40,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:40,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:40,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:40,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:31:40,699 INFO L87 Difference]: Start difference. First operand 18421 states and 23481 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 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 23:31:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:41,790 INFO L93 Difference]: Finished difference Result 51669 states and 67367 transitions. [2022-01-09 23:31:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:31:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 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 238 [2022-01-09 23:31:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:41,849 INFO L225 Difference]: With dead ends: 51669 [2022-01-09 23:31:41,850 INFO L226 Difference]: Without dead ends: 33250 [2022-01-09 23:31:41,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:31:41,874 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 617 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:41,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 185 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-09 23:31:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33250 states. [2022-01-09 23:31:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33250 to 33240. [2022-01-09 23:31:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33240 states, 33239 states have (on average 1.203375552814465) internal successors, (39999), 33239 states have internal predecessors, (39999), 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 23:31:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33240 states to 33240 states and 39999 transitions. [2022-01-09 23:31:42,402 INFO L78 Accepts]: Start accepts. Automaton has 33240 states and 39999 transitions. Word has length 238 [2022-01-09 23:31:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:42,402 INFO L470 AbstractCegarLoop]: Abstraction has 33240 states and 39999 transitions. [2022-01-09 23:31:42,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 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 23:31:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 33240 states and 39999 transitions. [2022-01-09 23:31:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-09 23:31:42,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:42,512 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:42,545 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 23:31:42,712 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,SelfDestructingSolverStorable8 [2022-01-09 23:31:42,713 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:42,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1507272799, now seen corresponding path program 1 times [2022-01-09 23:31:42,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:42,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845188404] [2022-01-09 23:31:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:42,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:31:42,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:42,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845188404] [2022-01-09 23:31:42,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845188404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:42,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:42,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:42,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757703187] [2022-01-09 23:31:42,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:42,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:42,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:42,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:42,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:31:42,790 INFO L87 Difference]: Start difference. First operand 33240 states and 39999 transitions. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 23:31:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:43,645 INFO L93 Difference]: Finished difference Result 79005 states and 95628 transitions. [2022-01-09 23:31:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:31:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 246 [2022-01-09 23:31:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:43,705 INFO L225 Difference]: With dead ends: 79005 [2022-01-09 23:31:43,705 INFO L226 Difference]: Without dead ends: 45970 [2022-01-09 23:31:43,734 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 23:31:43,734 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 460 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:43,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 55 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:31:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45970 states. [2022-01-09 23:31:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45970 to 43331. [2022-01-09 23:31:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43331 states, 43330 states have (on average 1.1515116547426725) internal successors, (49895), 43330 states have internal predecessors, (49895), 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 23:31:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43331 states to 43331 states and 49895 transitions. [2022-01-09 23:31:44,386 INFO L78 Accepts]: Start accepts. Automaton has 43331 states and 49895 transitions. Word has length 246 [2022-01-09 23:31:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:44,387 INFO L470 AbstractCegarLoop]: Abstraction has 43331 states and 49895 transitions. [2022-01-09 23:31:44,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 23:31:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 43331 states and 49895 transitions. [2022-01-09 23:31:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-09 23:31:44,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:44,408 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:44,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-09 23:31:44,408 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1080587592, now seen corresponding path program 1 times [2022-01-09 23:31:44,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:44,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102330896] [2022-01-09 23:31:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:44,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:31:44,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:44,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102330896] [2022-01-09 23:31:44,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102330896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:44,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:44,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:31:44,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507909565] [2022-01-09 23:31:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:44,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:44,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:44,474 INFO L87 Difference]: Start difference. First operand 43331 states and 49895 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 23:31:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:45,333 INFO L93 Difference]: Finished difference Result 96841 states and 111915 transitions. [2022-01-09 23:31:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:45,334 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 261 [2022-01-09 23:31:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:45,403 INFO L225 Difference]: With dead ends: 96841 [2022-01-09 23:31:45,404 INFO L226 Difference]: Without dead ends: 53715 [2022-01-09 23:31:45,432 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 23:31:45,433 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 202 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:45,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 145 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:31:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53715 states. [2022-01-09 23:31:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53715 to 53500. [2022-01-09 23:31:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53500 states, 53499 states have (on average 1.1574421951812184) internal successors, (61922), 53499 states have internal predecessors, (61922), 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 23:31:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53500 states to 53500 states and 61922 transitions. [2022-01-09 23:31:46,376 INFO L78 Accepts]: Start accepts. Automaton has 53500 states and 61922 transitions. Word has length 261 [2022-01-09 23:31:46,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:46,376 INFO L470 AbstractCegarLoop]: Abstraction has 53500 states and 61922 transitions. [2022-01-09 23:31:46,377 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 23:31:46,377 INFO L276 IsEmpty]: Start isEmpty. Operand 53500 states and 61922 transitions. [2022-01-09 23:31:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-09 23:31:46,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:46,396 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:46,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-09 23:31:46,396 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:46,397 INFO L85 PathProgramCache]: Analyzing trace with hash -833244104, now seen corresponding path program 1 times [2022-01-09 23:31:46,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:46,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846773598] [2022-01-09 23:31:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:46,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:31:46,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:46,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846773598] [2022-01-09 23:31:46,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846773598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:46,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073307808] [2022-01-09 23:31:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:46,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:46,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:46,474 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 23:31:46,475 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 23:31:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:31:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:31:47,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:31:47,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073307808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:47,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:31:47,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:31:47,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691514941] [2022-01-09 23:31:47,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:47,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:47,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:47,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:31:47,013 INFO L87 Difference]: Start difference. First operand 53500 states and 61922 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 23:31:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:48,027 INFO L93 Difference]: Finished difference Result 153142 states and 177553 transitions. [2022-01-09 23:31:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:31:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 266 [2022-01-09 23:31:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:48,152 INFO L225 Difference]: With dead ends: 153142 [2022-01-09 23:31:48,153 INFO L226 Difference]: Without dead ends: 100254 [2022-01-09 23:31:48,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:31:48,186 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 746 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:48,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 309 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:31:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100254 states. [2022-01-09 23:31:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100254 to 85416. [2022-01-09 23:31:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85416 states, 85415 states have (on average 1.1460048000936605) internal successors, (97886), 85415 states have internal predecessors, (97886), 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 23:31:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85416 states to 85416 states and 97886 transitions. [2022-01-09 23:31:49,666 INFO L78 Accepts]: Start accepts. Automaton has 85416 states and 97886 transitions. Word has length 266 [2022-01-09 23:31:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:49,666 INFO L470 AbstractCegarLoop]: Abstraction has 85416 states and 97886 transitions. [2022-01-09 23:31:49,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 23:31:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 85416 states and 97886 transitions. [2022-01-09 23:31:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-09 23:31:49,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:49,706 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:49,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-09 23:31:49,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:49,910 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:49,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1283456450, now seen corresponding path program 1 times [2022-01-09 23:31:49,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:49,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519736258] [2022-01-09 23:31:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:49,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-09 23:31:50,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:50,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519736258] [2022-01-09 23:31:50,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519736258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:50,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:50,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:50,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553220448] [2022-01-09 23:31:50,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:50,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:50,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:50,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:50,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:31:50,009 INFO L87 Difference]: Start difference. First operand 85416 states and 97886 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 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 23:31:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:51,287 INFO L93 Difference]: Finished difference Result 230628 states and 264177 transitions. [2022-01-09 23:31:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:31:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 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 276 [2022-01-09 23:31:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:51,618 INFO L225 Difference]: With dead ends: 230628 [2022-01-09 23:31:51,619 INFO L226 Difference]: Without dead ends: 145824 [2022-01-09 23:31:51,664 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 23:31:51,666 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 556 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:51,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 460 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:31:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145824 states. [2022-01-09 23:31:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145824 to 143379. [2022-01-09 23:31:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143379 states, 143378 states have (on average 1.1419813360487663) internal successors, (163735), 143378 states have internal predecessors, (163735), 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 23:31:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143379 states to 143379 states and 163735 transitions. [2022-01-09 23:31:53,504 INFO L78 Accepts]: Start accepts. Automaton has 143379 states and 163735 transitions. Word has length 276 [2022-01-09 23:31:53,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:53,504 INFO L470 AbstractCegarLoop]: Abstraction has 143379 states and 163735 transitions. [2022-01-09 23:31:53,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 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 23:31:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 143379 states and 163735 transitions. [2022-01-09 23:31:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-09 23:31:53,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:53,716 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:53,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-09 23:31:53,716 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash 99903459, now seen corresponding path program 1 times [2022-01-09 23:31:53,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:53,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106624945] [2022-01-09 23:31:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:53,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:31:53,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:53,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106624945] [2022-01-09 23:31:53,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106624945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:53,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:53,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:53,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156591883] [2022-01-09 23:31:53,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:53,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:53,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:31:53,851 INFO L87 Difference]: Start difference. First operand 143379 states and 163735 transitions. Second operand has 4 states, 4 states have (on average 65.25) 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 23:31:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:55,470 INFO L93 Difference]: Finished difference Result 296321 states and 338265 transitions. [2022-01-09 23:31:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:31:55,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.25) 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 301 [2022-01-09 23:31:55,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:55,695 INFO L225 Difference]: With dead ends: 296321 [2022-01-09 23:31:55,695 INFO L226 Difference]: Without dead ends: 153554 [2022-01-09 23:31:55,761 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 23:31:55,762 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 409 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:55,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 167 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:31:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153554 states. [2022-01-09 23:31:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153554 to 152727. [2022-01-09 23:31:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152727 states, 152726 states have (on average 1.1388368712596415) internal successors, (173930), 152726 states have internal predecessors, (173930), 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 23:31:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152727 states to 152727 states and 173930 transitions. [2022-01-09 23:31:58,021 INFO L78 Accepts]: Start accepts. Automaton has 152727 states and 173930 transitions. Word has length 301 [2022-01-09 23:31:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:58,022 INFO L470 AbstractCegarLoop]: Abstraction has 152727 states and 173930 transitions. [2022-01-09 23:31:58,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) 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 23:31:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 152727 states and 173930 transitions. [2022-01-09 23:31:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-09 23:31:58,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:58,039 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 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 23:31:58,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-09 23:31:58,039 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:58,040 INFO L85 PathProgramCache]: Analyzing trace with hash -985167971, now seen corresponding path program 1 times [2022-01-09 23:31:58,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:58,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902559379] [2022-01-09 23:31:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:58,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:31:58,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:58,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902559379] [2022-01-09 23:31:58,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902559379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:58,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:58,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:58,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610935355] [2022-01-09 23:31:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:58,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:58,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:58,144 INFO L87 Difference]: Start difference. First operand 152727 states and 173930 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 23:31:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:59,477 INFO L93 Difference]: Finished difference Result 310750 states and 355129 transitions. [2022-01-09 23:31:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:59,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 305 [2022-01-09 23:31:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:59,890 INFO L225 Difference]: With dead ends: 310750 [2022-01-09 23:31:59,890 INFO L226 Difference]: Without dead ends: 159449 [2022-01-09 23:31:59,944 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 23:31:59,945 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 173 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:59,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 375 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159449 states. [2022-01-09 23:32:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159449 to 155389. [2022-01-09 23:32:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155389 states, 155388 states have (on average 1.1273843540041701) internal successors, (175182), 155388 states have internal predecessors, (175182), 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 23:32:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155389 states to 155389 states and 175182 transitions. [2022-01-09 23:32:02,159 INFO L78 Accepts]: Start accepts. Automaton has 155389 states and 175182 transitions. Word has length 305 [2022-01-09 23:32:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:02,159 INFO L470 AbstractCegarLoop]: Abstraction has 155389 states and 175182 transitions. [2022-01-09 23:32:02,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 23:32:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 155389 states and 175182 transitions. [2022-01-09 23:32:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-01-09 23:32:02,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:02,178 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:02,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-09 23:32:02,178 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1142524655, now seen corresponding path program 1 times [2022-01-09 23:32:02,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:02,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044834539] [2022-01-09 23:32:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:02,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-09 23:32:02,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044834539] [2022-01-09 23:32:02,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044834539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:02,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:02,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:02,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505160409] [2022-01-09 23:32:02,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:02,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:02,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:02,249 INFO L87 Difference]: Start difference. First operand 155389 states and 175182 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 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 23:32:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:03,580 INFO L93 Difference]: Finished difference Result 324196 states and 364774 transitions. [2022-01-09 23:32:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 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 328 [2022-01-09 23:32:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:04,010 INFO L225 Difference]: With dead ends: 324196 [2022-01-09 23:32:04,011 INFO L226 Difference]: Without dead ends: 170436 [2022-01-09 23:32:04,043 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 23:32:04,043 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 203 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:04,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 157 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170436 states. [2022-01-09 23:32:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170436 to 168810. [2022-01-09 23:32:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168810 states, 168809 states have (on average 1.12329318934417) internal successors, (189622), 168809 states have internal predecessors, (189622), 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 23:32:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168810 states to 168810 states and 189622 transitions. [2022-01-09 23:32:06,504 INFO L78 Accepts]: Start accepts. Automaton has 168810 states and 189622 transitions. Word has length 328 [2022-01-09 23:32:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:06,505 INFO L470 AbstractCegarLoop]: Abstraction has 168810 states and 189622 transitions. [2022-01-09 23:32:06,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 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 23:32:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 168810 states and 189622 transitions. [2022-01-09 23:32:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-01-09 23:32:06,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:06,524 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-09 23:32:06,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-09 23:32:06,524 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1536803488, now seen corresponding path program 1 times [2022-01-09 23:32:06,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:06,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30841336] [2022-01-09 23:32:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:06,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-01-09 23:32:06,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30841336] [2022-01-09 23:32:06,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30841336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:06,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:06,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:32:06,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462257120] [2022-01-09 23:32:06,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:06,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:06,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:06,604 INFO L87 Difference]: Start difference. First operand 168810 states and 189622 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 23:32:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:08,021 INFO L93 Difference]: Finished difference Result 327082 states and 367575 transitions. [2022-01-09 23:32:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:08,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 330 [2022-01-09 23:32:08,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:08,480 INFO L225 Difference]: With dead ends: 327082 [2022-01-09 23:32:08,481 INFO L226 Difference]: Without dead ends: 160717 [2022-01-09 23:32:08,543 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 23:32:08,543 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 167 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:08,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 347 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160717 states. [2022-01-09 23:32:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160717 to 139758. [2022-01-09 23:32:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139758 states, 139757 states have (on average 1.1236503359402392) internal successors, (157038), 139757 states have internal predecessors, (157038), 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 23:32:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139758 states to 139758 states and 157038 transitions. [2022-01-09 23:32:10,519 INFO L78 Accepts]: Start accepts. Automaton has 139758 states and 157038 transitions. Word has length 330 [2022-01-09 23:32:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:10,519 INFO L470 AbstractCegarLoop]: Abstraction has 139758 states and 157038 transitions. [2022-01-09 23:32:10,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 23:32:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 139758 states and 157038 transitions. [2022-01-09 23:32:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-01-09 23:32:10,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:10,540 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 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] [2022-01-09 23:32:10,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-09 23:32:10,540 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:10,541 INFO L85 PathProgramCache]: Analyzing trace with hash 986990376, now seen corresponding path program 1 times [2022-01-09 23:32:10,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:10,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465324982] [2022-01-09 23:32:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:10,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-01-09 23:32:10,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:10,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465324982] [2022-01-09 23:32:10,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465324982] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:10,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:10,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:32:10,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461486175] [2022-01-09 23:32:10,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:10,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:10,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:10,612 INFO L87 Difference]: Start difference. First operand 139758 states and 157038 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 23:32:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:11,796 INFO L93 Difference]: Finished difference Result 250833 states and 280509 transitions. [2022-01-09 23:32:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:11,797 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 337 [2022-01-09 23:32:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:11,952 INFO L225 Difference]: With dead ends: 250833 [2022-01-09 23:32:11,953 INFO L226 Difference]: Without dead ends: 110877 [2022-01-09 23:32:12,243 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 23:32:12,243 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 223 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:12,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 310 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110877 states. [2022-01-09 23:32:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110877 to 90561. [2022-01-09 23:32:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90561 states, 90560 states have (on average 1.0718308303886925) internal successors, (97065), 90560 states have internal predecessors, (97065), 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 23:32:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90561 states to 90561 states and 97065 transitions. [2022-01-09 23:32:13,509 INFO L78 Accepts]: Start accepts. Automaton has 90561 states and 97065 transitions. Word has length 337 [2022-01-09 23:32:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:13,509 INFO L470 AbstractCegarLoop]: Abstraction has 90561 states and 97065 transitions. [2022-01-09 23:32:13,509 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 23:32:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 90561 states and 97065 transitions. [2022-01-09 23:32:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-09 23:32:13,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:13,529 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-09 23:32:13,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-09 23:32:13,530 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:13,530 INFO L85 PathProgramCache]: Analyzing trace with hash 334417663, now seen corresponding path program 1 times [2022-01-09 23:32:13,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:13,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915068823] [2022-01-09 23:32:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:13,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 159 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:32:13,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:13,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915068823] [2022-01-09 23:32:13,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915068823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:32:13,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578284551] [2022-01-09 23:32:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:13,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:13,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:32:13,643 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 23:32:13,645 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 23:32:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:13,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:32:13,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:32:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:32:14,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:32:14,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578284551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:14,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:32:14,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:32:14,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41009921] [2022-01-09 23:32:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:14,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:32:14,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:14,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:32:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:32:14,166 INFO L87 Difference]: Start difference. First operand 90561 states and 97065 transitions. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 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 23:32:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:15,358 INFO L93 Difference]: Finished difference Result 189690 states and 203346 transitions. [2022-01-09 23:32:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:32:15,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 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 23:32:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:15,477 INFO L225 Difference]: With dead ends: 189690 [2022-01-09 23:32:15,478 INFO L226 Difference]: Without dead ends: 101577 [2022-01-09 23:32:15,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:32:15,527 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 454 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:15,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 96 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 23:32:15,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101577 states. [2022-01-09 23:32:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101577 to 96848. [2022-01-09 23:32:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96848 states, 96847 states have (on average 1.0596301382593163) internal successors, (102622), 96847 states have internal predecessors, (102622), 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 23:32:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96848 states to 96848 states and 102622 transitions. [2022-01-09 23:32:17,108 INFO L78 Accepts]: Start accepts. Automaton has 96848 states and 102622 transitions. Word has length 339 [2022-01-09 23:32:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:17,109 INFO L470 AbstractCegarLoop]: Abstraction has 96848 states and 102622 transitions. [2022-01-09 23:32:17,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 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 23:32:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 96848 states and 102622 transitions. [2022-01-09 23:32:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-09 23:32:17,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:17,133 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:17,150 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 23:32:17,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:17,351 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2046811077, now seen corresponding path program 1 times [2022-01-09 23:32:17,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:17,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570449635] [2022-01-09 23:32:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:17,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 174 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:32:17,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570449635] [2022-01-09 23:32:17,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570449635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:32:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806196883] [2022-01-09 23:32:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:17,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:17,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:32:17,494 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 23:32:17,495 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 23:32:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:17,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:32:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:32:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-09 23:32:18,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:32:18,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806196883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:18,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:32:18,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-09 23:32:18,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585760682] [2022-01-09 23:32:18,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:18,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:18,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:32:18,024 INFO L87 Difference]: Start difference. First operand 96848 states and 102622 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 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 23:32:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:18,880 INFO L93 Difference]: Finished difference Result 274464 states and 290640 transitions. [2022-01-09 23:32:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:18,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 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 361 [2022-01-09 23:32:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:19,096 INFO L225 Difference]: With dead ends: 274464 [2022-01-09 23:32:19,097 INFO L226 Difference]: Without dead ends: 179245 [2022-01-09 23:32:19,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 360 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 23:32:19,154 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:19,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 485 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:32:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179245 states. [2022-01-09 23:32:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179245 to 177605. [2022-01-09 23:32:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177605 states, 177604 states have (on average 1.0582194094727597) internal successors, (187944), 177604 states have internal predecessors, (187944), 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 23:32:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177605 states to 177605 states and 187944 transitions. [2022-01-09 23:32:21,513 INFO L78 Accepts]: Start accepts. Automaton has 177605 states and 187944 transitions. Word has length 361 [2022-01-09 23:32:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:21,514 INFO L470 AbstractCegarLoop]: Abstraction has 177605 states and 187944 transitions. [2022-01-09 23:32:21,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 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 23:32:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 177605 states and 187944 transitions. [2022-01-09 23:32:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-01-09 23:32:21,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:21,530 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:21,547 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 23:32:21,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:21,733 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1607340768, now seen corresponding path program 1 times [2022-01-09 23:32:21,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:21,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291425028] [2022-01-09 23:32:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:21,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 263 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 23:32:22,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:22,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291425028] [2022-01-09 23:32:22,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291425028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:32:22,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120915142] [2022-01-09 23:32:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:22,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:22,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:32:22,133 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 23:32:22,134 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 23:32:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:32:22,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:32:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:32:22,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:32:22,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120915142] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:22,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:32:22,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-01-09 23:32:22,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208834137] [2022-01-09 23:32:22,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:22,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:32:22,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:32:22,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:32:22,735 INFO L87 Difference]: Start difference. First operand 177605 states and 187944 transitions. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 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 23:32:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:24,347 INFO L93 Difference]: Finished difference Result 351007 states and 371560 transitions. [2022-01-09 23:32:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:32:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 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 388 [2022-01-09 23:32:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:24,792 INFO L225 Difference]: With dead ends: 351007 [2022-01-09 23:32:24,793 INFO L226 Difference]: Without dead ends: 176045 [2022-01-09 23:32:24,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:32:24,870 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 389 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:24,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 301 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:32:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176045 states. [2022-01-09 23:32:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176045 to 175569. [2022-01-09 23:32:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175569 states, 175568 states have (on average 1.0532158479905223) internal successors, (184911), 175568 states have internal predecessors, (184911), 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 23:32:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175569 states to 175569 states and 184911 transitions. [2022-01-09 23:32:27,439 INFO L78 Accepts]: Start accepts. Automaton has 175569 states and 184911 transitions. Word has length 388 [2022-01-09 23:32:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:27,439 INFO L470 AbstractCegarLoop]: Abstraction has 175569 states and 184911 transitions. [2022-01-09 23:32:27,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 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 23:32:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 175569 states and 184911 transitions. [2022-01-09 23:32:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-01-09 23:32:27,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:27,456 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:27,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 23:32:27,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:27,674 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:27,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash -314201282, now seen corresponding path program 1 times [2022-01-09 23:32:27,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:27,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353147030] [2022-01-09 23:32:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:27,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 245 proven. 62 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:32:27,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353147030] [2022-01-09 23:32:27,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353147030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:32:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133581230] [2022-01-09 23:32:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:27,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:27,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:32:27,865 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 23:32:27,866 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 23:32:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:28,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:32:28,035 INFO L286 TraceCheckSpWp]: Computing forward predicates...