/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:33:47,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:33:47,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:33:47,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:33:47,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 20:33:47,411 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:33:47,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:33:47,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:33:47,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:33:47,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:33:47,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:33:47,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:33:47,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:33:47,414 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:33:47,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:33:47,414 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:33:47,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:33:47,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:33:47,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:33:47,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:33:47,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:33:47,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:33:47,416 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:33:47,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:33:47,416 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:33:47,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:33:47,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:33:47,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:33:47,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:33:47,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:33:47,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:33:47,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:33:47,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:33:47,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:33:47,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:33:47,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:33:47,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:33:47,418 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:33:47,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:33:47,418 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:33:47,418 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:33:47,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:33:47,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:33:47,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:33:47,682 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:33:47,682 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:33:47,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label59.c [2023-04-01 20:33:48,789 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:33:49,108 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:33:49,108 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label59.c [2023-04-01 20:33:49,119 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/276c9c2f9/425cde34ddfa4f58a2e05fb66d112bf3/FLAG9075d121f [2023-04-01 20:33:49,134 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/276c9c2f9/425cde34ddfa4f58a2e05fb66d112bf3 [2023-04-01 20:33:49,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:33:49,138 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:33:49,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:33:49,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:33:49,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:33:49,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:49,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4ce915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49, skipping insertion in model container [2023-04-01 20:33:49,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:49,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:33:49,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:33:49,719 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label59.c[57711,57724] [2023-04-01 20:33:49,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:33:49,783 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:33:49,930 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label59.c[57711,57724] [2023-04-01 20:33:49,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:33:49,960 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:33:49,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49 WrapperNode [2023-04-01 20:33:49,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:33:49,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:33:49,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:33:49,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:33:49,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:49,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:50,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:50,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:50,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:50,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:50,078 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:50,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:50,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:33:50,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:33:50,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:33:50,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:33:50,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (1/1) ... [2023-04-01 20:33:50,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:33:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:33:50,143 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) [2023-04-01 20:33:50,153 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 [2023-04-01 20:33:50,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:33:50,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:33:50,183 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:33:50,183 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:33:50,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:33:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:33:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:33:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:33:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:33:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:33:50,290 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:33:50,292 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:33:51,802 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:33:51,810 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:33:51,810 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:33:51,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:33:51 BoogieIcfgContainer [2023-04-01 20:33:51,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:33:51,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:33:51,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:33:51,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:33:51,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:33:49" (1/3) ... [2023-04-01 20:33:51,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ff3bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:33:51, skipping insertion in model container [2023-04-01 20:33:51,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:33:49" (2/3) ... [2023-04-01 20:33:51,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ff3bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:33:51, skipping insertion in model container [2023-04-01 20:33:51,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:33:51" (3/3) ... [2023-04-01 20:33:51,818 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label59.c [2023-04-01 20:33:51,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:33:51,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:33:51,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:33:51,881 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ee670b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:33:51,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:33:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:33:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-04-01 20:33:51,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:33:51,901 INFO L195 NwaCegarLoop]: 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] [2023-04-01 20:33:51,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:33:51,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:33:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1913212598, now seen corresponding path program 1 times [2023-04-01 20:33:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:33:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948146183] [2023-04-01 20:33:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:33:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:33:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:33:53,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:33:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:33:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:33:53,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:33:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948146183] [2023-04-01 20:33:53,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948146183] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:33:53,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:33:53,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:33:53,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274778783] [2023-04-01 20:33:53,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:33:53,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:33:53,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:33:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:33:53,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:33:53,435 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:33:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:33:55,507 INFO L93 Difference]: Finished difference Result 867 states and 1525 transitions. [2023-04-01 20:33:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:33:55,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2023-04-01 20:33:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:33:55,522 INFO L225 Difference]: With dead ends: 867 [2023-04-01 20:33:55,522 INFO L226 Difference]: Without dead ends: 478 [2023-04-01 20:33:55,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:33:55,535 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 629 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:33:55,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 51 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 20:33:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-04-01 20:33:55,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 463. [2023-04-01 20:33:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 453 states have (on average 1.5827814569536425) internal successors, (717), 455 states have internal predecessors, (717), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:33:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 728 transitions. [2023-04-01 20:33:55,624 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 728 transitions. Word has length 180 [2023-04-01 20:33:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:33:55,625 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 728 transitions. [2023-04-01 20:33:55,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:33:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 728 transitions. [2023-04-01 20:33:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-04-01 20:33:55,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:33:55,631 INFO L195 NwaCegarLoop]: 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] [2023-04-01 20:33:55,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:33:55,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:33:55,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:33:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash 245382477, now seen corresponding path program 1 times [2023-04-01 20:33:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:33:55,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423593190] [2023-04-01 20:33:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:33:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:33:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:33:56,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:33:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:33:56,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:33:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:33:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:33:56,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:33:56,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423593190] [2023-04-01 20:33:56,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423593190] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:33:56,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:33:56,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:33:56,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588709567] [2023-04-01 20:33:56,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:33:56,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:33:56,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:33:56,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:33:56,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:33:56,321 INFO L87 Difference]: Start difference. First operand 463 states and 728 transitions. Second operand has 8 states, 7 states have (on average 26.285714285714285) internal successors, (184), 5 states have internal predecessors, (184), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:33:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:33:59,078 INFO L93 Difference]: Finished difference Result 1814 states and 2915 transitions. [2023-04-01 20:33:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:33:59,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 26.285714285714285) internal successors, (184), 5 states have internal predecessors, (184), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 190 [2023-04-01 20:33:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:33:59,089 INFO L225 Difference]: With dead ends: 1814 [2023-04-01 20:33:59,090 INFO L226 Difference]: Without dead ends: 1357 [2023-04-01 20:33:59,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:33:59,098 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1306 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:33:59,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1306 Valid, 153 Invalid, 2127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 20:33:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2023-04-01 20:33:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1335. [2023-04-01 20:33:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1307 states have (on average 1.4521805661820963) internal successors, (1898), 1319 states have internal predecessors, (1898), 8 states have call successors, (8), 8 states have call predecessors, (8), 19 states have return successors, (51), 7 states have call predecessors, (51), 7 states have call successors, (51) [2023-04-01 20:33:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1957 transitions. [2023-04-01 20:33:59,180 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1957 transitions. Word has length 190 [2023-04-01 20:33:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:33:59,185 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 1957 transitions. [2023-04-01 20:33:59,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 26.285714285714285) internal successors, (184), 5 states have internal predecessors, (184), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:33:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1957 transitions. [2023-04-01 20:33:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-04-01 20:33:59,191 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:33:59,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:33:59,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:33:59,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:33:59,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:33:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1387442092, now seen corresponding path program 1 times [2023-04-01 20:33:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:33:59,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306009606] [2023-04-01 20:33:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:33:59,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:33:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:33:59,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:33:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:33:59,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:33:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:33:59,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:33:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:33:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:33:59,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:33:59,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306009606] [2023-04-01 20:33:59,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306009606] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:33:59,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952573442] [2023-04-01 20:33:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:33:59,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:33:59,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:33:59,879 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) [2023-04-01 20:33:59,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:34:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:00,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:34:00,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:34:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:34:00,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:34:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:34:00,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952573442] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:34:00,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:34:00,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-01 20:34:00,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862175330] [2023-04-01 20:34:00,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:34:00,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:34:00,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:00,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:34:00,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:34:00,438 INFO L87 Difference]: Start difference. First operand 1335 states and 1957 transitions. Second operand has 13 states, 13 states have (on average 16.846153846153847) internal successors, (219), 11 states have internal predecessors, (219), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:34:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:34:06,540 INFO L93 Difference]: Finished difference Result 9484 states and 16779 transitions. [2023-04-01 20:34:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-04-01 20:34:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.846153846153847) internal successors, (219), 11 states have internal predecessors, (219), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 202 [2023-04-01 20:34:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:34:06,606 INFO L225 Difference]: With dead ends: 9484 [2023-04-01 20:34:06,606 INFO L226 Difference]: Without dead ends: 8155 [2023-04-01 20:34:06,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=595, Invalid=2597, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 20:34:06,618 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 5097 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 3852 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5097 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 5004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 3852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:34:06,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5097 Valid, 346 Invalid, 5004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 3852 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 20:34:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8155 states. [2023-04-01 20:34:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8155 to 7915. [2023-04-01 20:34:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7915 states, 7662 states have (on average 1.2424954320020882) internal successors, (9520), 7839 states have internal predecessors, (9520), 38 states have call successors, (38), 38 states have call predecessors, (38), 214 states have return successors, (1264), 37 states have call predecessors, (1264), 37 states have call successors, (1264) [2023-04-01 20:34:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7915 states to 7915 states and 10822 transitions. [2023-04-01 20:34:06,943 INFO L78 Accepts]: Start accepts. Automaton has 7915 states and 10822 transitions. Word has length 202 [2023-04-01 20:34:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:34:06,944 INFO L495 AbstractCegarLoop]: Abstraction has 7915 states and 10822 transitions. [2023-04-01 20:34:06,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.846153846153847) internal successors, (219), 11 states have internal predecessors, (219), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:34:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 7915 states and 10822 transitions. [2023-04-01 20:34:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-04-01 20:34:06,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:34:06,962 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:34:06,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 20:34:07,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:07,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:34:07,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:34:07,171 INFO L85 PathProgramCache]: Analyzing trace with hash 235013806, now seen corresponding path program 1 times [2023-04-01 20:34:07,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:34:07,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047163749] [2023-04-01 20:34:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:07,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:34:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:07,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:34:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:08,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:34:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:34:08,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:34:08,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047163749] [2023-04-01 20:34:08,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047163749] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:34:08,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:34:08,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:34:08,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442467566] [2023-04-01 20:34:08,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:34:08,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:34:08,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:34:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:34:08,166 INFO L87 Difference]: Start difference. First operand 7915 states and 10822 transitions. Second operand has 8 states, 7 states have (on average 30.285714285714285) internal successors, (212), 5 states have internal predecessors, (212), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:34:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:34:10,654 INFO L93 Difference]: Finished difference Result 23163 states and 31817 transitions. [2023-04-01 20:34:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 20:34:10,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 30.285714285714285) internal successors, (212), 5 states have internal predecessors, (212), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 218 [2023-04-01 20:34:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:34:10,740 INFO L225 Difference]: With dead ends: 23163 [2023-04-01 20:34:10,740 INFO L226 Difference]: Without dead ends: 15254 [2023-04-01 20:34:10,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:34:10,767 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1644 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:34:10,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 130 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 20:34:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15254 states. [2023-04-01 20:34:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15254 to 15160. [2023-04-01 20:34:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15160 states, 14750 states have (on average 1.2246779661016949) internal successors, (18064), 15016 states have internal predecessors, (18064), 72 states have call successors, (72), 72 states have call predecessors, (72), 337 states have return successors, (2277), 71 states have call predecessors, (2277), 71 states have call successors, (2277) [2023-04-01 20:34:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15160 states to 15160 states and 20413 transitions. [2023-04-01 20:34:11,322 INFO L78 Accepts]: Start accepts. Automaton has 15160 states and 20413 transitions. Word has length 218 [2023-04-01 20:34:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:34:11,323 INFO L495 AbstractCegarLoop]: Abstraction has 15160 states and 20413 transitions. [2023-04-01 20:34:11,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 30.285714285714285) internal successors, (212), 5 states have internal predecessors, (212), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:34:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 15160 states and 20413 transitions. [2023-04-01 20:34:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-04-01 20:34:11,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:34:11,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:34:11,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 20:34:11,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:34:11,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:34:11,354 INFO L85 PathProgramCache]: Analyzing trace with hash -16542265, now seen corresponding path program 1 times [2023-04-01 20:34:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:34:11,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758944263] [2023-04-01 20:34:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:11,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:34:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:12,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:34:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:12,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:34:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:34:12,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:34:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758944263] [2023-04-01 20:34:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758944263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:34:12,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:34:12,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:34:12,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506387591] [2023-04-01 20:34:12,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:34:12,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:34:12,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:12,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:34:12,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:34:12,687 INFO L87 Difference]: Start difference. First operand 15160 states and 20413 transitions. Second operand has 7 states, 6 states have (on average 36.5) internal successors, (219), 4 states have internal predecessors, (219), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:34:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:34:14,738 INFO L93 Difference]: Finished difference Result 35981 states and 49239 transitions. [2023-04-01 20:34:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:34:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 36.5) internal successors, (219), 4 states have internal predecessors, (219), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 225 [2023-04-01 20:34:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:34:14,843 INFO L225 Difference]: With dead ends: 35981 [2023-04-01 20:34:14,843 INFO L226 Difference]: Without dead ends: 20827 [2023-04-01 20:34:14,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:34:14,879 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1461 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:34:14,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1461 Valid, 120 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 20:34:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20827 states. [2023-04-01 20:34:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20827 to 20686. [2023-04-01 20:34:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20686 states, 20156 states have (on average 1.2128398491764238) internal successors, (24446), 20490 states have internal predecessors, (24446), 98 states have call successors, (98), 98 states have call predecessors, (98), 431 states have return successors, (3112), 97 states have call predecessors, (3112), 97 states have call successors, (3112) [2023-04-01 20:34:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20686 states to 20686 states and 27656 transitions. [2023-04-01 20:34:15,603 INFO L78 Accepts]: Start accepts. Automaton has 20686 states and 27656 transitions. Word has length 225 [2023-04-01 20:34:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:34:15,604 INFO L495 AbstractCegarLoop]: Abstraction has 20686 states and 27656 transitions. [2023-04-01 20:34:15,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 36.5) internal successors, (219), 4 states have internal predecessors, (219), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:34:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 20686 states and 27656 transitions. [2023-04-01 20:34:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-04-01 20:34:15,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:34:15,647 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:34:15,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 20:34:15,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:34:15,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:34:15,649 INFO L85 PathProgramCache]: Analyzing trace with hash 281827514, now seen corresponding path program 1 times [2023-04-01 20:34:15,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:34:15,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568423531] [2023-04-01 20:34:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:15,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:34:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:16,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:34:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:16,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:34:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:16,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 20:34:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:34:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:34:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568423531] [2023-04-01 20:34:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568423531] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:34:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151162816] [2023-04-01 20:34:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:16,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:34:16,804 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) [2023-04-01 20:34:16,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:34:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:17,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:34:17,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:34:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:34:17,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:34:17,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151162816] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:34:17,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:34:17,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:34:17,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122698418] [2023-04-01 20:34:17,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:34:17,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:34:17,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:34:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:34:17,137 INFO L87 Difference]: Start difference. First operand 20686 states and 27656 transitions. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:34:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:34:18,537 INFO L93 Difference]: Finished difference Result 57409 states and 80042 transitions. [2023-04-01 20:34:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:34:18,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 231 [2023-04-01 20:34:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:34:18,698 INFO L225 Difference]: With dead ends: 57409 [2023-04-01 20:34:18,698 INFO L226 Difference]: Without dead ends: 36936 [2023-04-01 20:34:18,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:34:18,766 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 785 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:34:18,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 167 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 20:34:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36936 states. [2023-04-01 20:34:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36936 to 36642. [2023-04-01 20:34:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36642 states, 35758 states have (on average 1.1857766094300577) internal successors, (42401), 36296 states have internal predecessors, (42401), 173 states have call successors, (173), 173 states have call predecessors, (173), 710 states have return successors, (5525), 172 states have call predecessors, (5525), 172 states have call successors, (5525) [2023-04-01 20:34:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36642 states to 36642 states and 48099 transitions. [2023-04-01 20:34:20,217 INFO L78 Accepts]: Start accepts. Automaton has 36642 states and 48099 transitions. Word has length 231 [2023-04-01 20:34:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:34:20,217 INFO L495 AbstractCegarLoop]: Abstraction has 36642 states and 48099 transitions. [2023-04-01 20:34:20,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:34:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 36642 states and 48099 transitions. [2023-04-01 20:34:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-04-01 20:34:20,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:34:20,269 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:34:20,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:34:20,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 20:34:20,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:34:20,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:34:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash -144213633, now seen corresponding path program 1 times [2023-04-01 20:34:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:34:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112803833] [2023-04-01 20:34:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:34:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:21,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:34:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:21,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:34:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:21,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:34:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:34:21,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:34:21,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112803833] [2023-04-01 20:34:21,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112803833] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:34:21,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275208855] [2023-04-01 20:34:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:21,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:21,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:34:21,618 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) [2023-04-01 20:34:21,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:34:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:21,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:34:21,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:34:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:34:22,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:34:22,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275208855] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:34:22,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:34:22,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 20:34:22,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695922382] [2023-04-01 20:34:22,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:34:22,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:34:22,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:34:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:34:22,029 INFO L87 Difference]: Start difference. First operand 36642 states and 48099 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:34:23,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:34:23,171 INFO L93 Difference]: Finished difference Result 72239 states and 94927 transitions. [2023-04-01 20:34:23,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:34:23,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 236 [2023-04-01 20:34:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:34:23,322 INFO L225 Difference]: With dead ends: 72239 [2023-04-01 20:34:23,322 INFO L226 Difference]: Without dead ends: 35810 [2023-04-01 20:34:23,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:34:23,384 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 64 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:34:23,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 420 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:34:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35810 states. [2023-04-01 20:34:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35810 to 35770. [2023-04-01 20:34:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35770 states, 34916 states have (on average 1.1739317218467178) internal successors, (40989), 35432 states have internal predecessors, (40989), 169 states have call successors, (169), 169 states have call predecessors, (169), 684 states have return successors, (5049), 168 states have call predecessors, (5049), 168 states have call successors, (5049) [2023-04-01 20:34:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35770 states to 35770 states and 46207 transitions. [2023-04-01 20:34:24,427 INFO L78 Accepts]: Start accepts. Automaton has 35770 states and 46207 transitions. Word has length 236 [2023-04-01 20:34:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:34:24,428 INFO L495 AbstractCegarLoop]: Abstraction has 35770 states and 46207 transitions. [2023-04-01 20:34:24,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:34:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 35770 states and 46207 transitions. [2023-04-01 20:34:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-04-01 20:34:24,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:34:24,465 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:34:24,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:34:24,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:24,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:34:24,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:34:24,674 INFO L85 PathProgramCache]: Analyzing trace with hash -986494946, now seen corresponding path program 1 times [2023-04-01 20:34:24,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:34:24,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61155360] [2023-04-01 20:34:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:24,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:34:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:25,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:34:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:25,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:34:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:25,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:34:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:34:25,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:34:25,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61155360] [2023-04-01 20:34:25,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61155360] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:34:25,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538926408] [2023-04-01 20:34:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:25,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:25,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:34:25,360 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) [2023-04-01 20:34:25,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:34:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:25,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:34:25,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:34:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:34:25,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:34:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538926408] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:34:25,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:34:25,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:34:25,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401014031] [2023-04-01 20:34:25,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:34:25,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:34:25,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:25,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:34:25,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:34:25,810 INFO L87 Difference]: Start difference. First operand 35770 states and 46207 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:34:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:34:26,758 INFO L93 Difference]: Finished difference Result 70912 states and 91691 transitions. [2023-04-01 20:34:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:34:26,759 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 244 [2023-04-01 20:34:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:34:26,894 INFO L225 Difference]: With dead ends: 70912 [2023-04-01 20:34:26,894 INFO L226 Difference]: Without dead ends: 35355 [2023-04-01 20:34:26,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:34:26,955 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 97 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:34:26,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 365 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:34:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35355 states. [2023-04-01 20:34:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35355 to 35351. [2023-04-01 20:34:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35351 states, 34503 states have (on average 1.1574645682984088) internal successors, (39936), 35017 states have internal predecessors, (39936), 167 states have call successors, (167), 167 states have call predecessors, (167), 680 states have return successors, (4554), 166 states have call predecessors, (4554), 166 states have call successors, (4554) [2023-04-01 20:34:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35351 states to 35351 states and 44657 transitions. [2023-04-01 20:34:27,838 INFO L78 Accepts]: Start accepts. Automaton has 35351 states and 44657 transitions. Word has length 244 [2023-04-01 20:34:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:34:27,838 INFO L495 AbstractCegarLoop]: Abstraction has 35351 states and 44657 transitions. [2023-04-01 20:34:27,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:34:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 35351 states and 44657 transitions. [2023-04-01 20:34:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-04-01 20:34:27,971 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:34:27,971 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:34:27,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 20:34:28,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:28,178 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:34:28,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:34:28,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1104150307, now seen corresponding path program 1 times [2023-04-01 20:34:28,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:34:28,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047161368] [2023-04-01 20:34:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:28,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:34:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:28,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:34:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:28,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:34:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:28,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:34:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:28,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-01 20:34:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:34:28,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:34:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047161368] [2023-04-01 20:34:28,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047161368] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:34:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224281804] [2023-04-01 20:34:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:28,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:28,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:34:28,789 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) [2023-04-01 20:34:28,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:34:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:29,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:34:29,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:34:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-01 20:34:29,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:34:29,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224281804] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:34:29,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:34:29,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:34:29,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265136166] [2023-04-01 20:34:29,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:34:29,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:34:29,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:34:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:34:29,236 INFO L87 Difference]: Start difference. First operand 35351 states and 44657 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:34:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:34:30,402 INFO L93 Difference]: Finished difference Result 87286 states and 111418 transitions. [2023-04-01 20:34:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:34:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 274 [2023-04-01 20:34:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:34:30,574 INFO L225 Difference]: With dead ends: 87286 [2023-04-01 20:34:30,574 INFO L226 Difference]: Without dead ends: 52148 [2023-04-01 20:34:30,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:34:30,621 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 74 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:34:30,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 234 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:34:30,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52148 states. [2023-04-01 20:34:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52148 to 49584. [2023-04-01 20:34:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49584 states, 48527 states have (on average 1.1628165763389453) internal successors, (56428), 49114 states have internal predecessors, (56428), 235 states have call successors, (235), 235 states have call predecessors, (235), 821 states have return successors, (6819), 234 states have call predecessors, (6819), 234 states have call successors, (6819) [2023-04-01 20:34:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49584 states to 49584 states and 63482 transitions. [2023-04-01 20:34:32,035 INFO L78 Accepts]: Start accepts. Automaton has 49584 states and 63482 transitions. Word has length 274 [2023-04-01 20:34:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:34:32,035 INFO L495 AbstractCegarLoop]: Abstraction has 49584 states and 63482 transitions. [2023-04-01 20:34:32,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:34:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 49584 states and 63482 transitions. [2023-04-01 20:34:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-04-01 20:34:32,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:34:32,099 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 20:34:32,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:34:32,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:32,306 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:34:32,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:34:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 152340813, now seen corresponding path program 1 times [2023-04-01 20:34:32,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:34:32,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139699330] [2023-04-01 20:34:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:32,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:34:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:32,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:34:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:33,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:34:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:33,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:34:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:33,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 20:34:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:33,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-04-01 20:34:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 113 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 20:34:33,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:34:33,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139699330] [2023-04-01 20:34:33,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139699330] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:34:33,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297044062] [2023-04-01 20:34:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:33,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:33,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:34:33,106 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) [2023-04-01 20:34:33,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:34:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:33,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:34:33,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:34:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-01 20:34:33,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:34:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 141 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-04-01 20:34:33,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297044062] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:34:33,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:34:33,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 20:34:33,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288623845] [2023-04-01 20:34:33,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:34:33,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 20:34:33,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 20:34:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:34:33,562 INFO L87 Difference]: Start difference. First operand 49584 states and 63482 transitions. Second operand has 11 states, 11 states have (on average 26.272727272727273) internal successors, (289), 9 states have internal predecessors, (289), 4 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 20:34:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:34:37,536 INFO L93 Difference]: Finished difference Result 114649 states and 168050 transitions. [2023-04-01 20:34:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 20:34:37,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 26.272727272727273) internal successors, (289), 9 states have internal predecessors, (289), 4 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 288 [2023-04-01 20:34:37,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:34:37,945 INFO L225 Difference]: With dead ends: 114649 [2023-04-01 20:34:37,946 INFO L226 Difference]: Without dead ends: 65908 [2023-04-01 20:34:38,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 588 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-04-01 20:34:38,014 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1862 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2775 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:34:38,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1862 Valid, 141 Invalid, 2935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2775 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 20:34:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65908 states. [2023-04-01 20:34:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65908 to 56340. [2023-04-01 20:34:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56340 states, 55123 states have (on average 1.1490666328030041) internal successors, (63340), 55806 states have internal predecessors, (63340), 267 states have call successors, (267), 267 states have call predecessors, (267), 949 states have return successors, (7150), 266 states have call predecessors, (7150), 266 states have call successors, (7150) [2023-04-01 20:34:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56340 states to 56340 states and 70757 transitions. [2023-04-01 20:34:40,224 INFO L78 Accepts]: Start accepts. Automaton has 56340 states and 70757 transitions. Word has length 288 [2023-04-01 20:34:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:34:40,225 INFO L495 AbstractCegarLoop]: Abstraction has 56340 states and 70757 transitions. [2023-04-01 20:34:40,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.272727272727273) internal successors, (289), 9 states have internal predecessors, (289), 4 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 20:34:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 56340 states and 70757 transitions. [2023-04-01 20:34:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-04-01 20:34:40,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:34:40,282 INFO L195 NwaCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:34:40,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 20:34:40,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:40,484 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:34:40,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:34:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1564044881, now seen corresponding path program 1 times [2023-04-01 20:34:40,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:34:40,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107613704] [2023-04-01 20:34:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:40,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:34:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:41,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:34:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:41,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:34:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:41,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 20:34:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 115 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:34:41,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:34:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107613704] [2023-04-01 20:34:41,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107613704] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:34:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601155524] [2023-04-01 20:34:41,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:41,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:41,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:34:41,781 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) [2023-04-01 20:34:41,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:34:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:42,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:34:42,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:34:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:34:42,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:34:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:34:42,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601155524] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:34:42,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:34:42,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 20:34:42,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642926458] [2023-04-01 20:34:42,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:34:42,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:34:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:34:42,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:34:42,273 INFO L87 Difference]: Start difference. First operand 56340 states and 70757 transitions. Second operand has 13 states, 13 states have (on average 32.0) internal successors, (416), 11 states have internal predecessors, (416), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:34:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:34:49,830 INFO L93 Difference]: Finished difference Result 134789 states and 199024 transitions. [2023-04-01 20:34:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-04-01 20:34:49,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 32.0) internal successors, (416), 11 states have internal predecessors, (416), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 303 [2023-04-01 20:34:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:34:50,285 INFO L225 Difference]: With dead ends: 134789 [2023-04-01 20:34:50,285 INFO L226 Difference]: Without dead ends: 79295 [2023-04-01 20:34:50,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 647 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=487, Invalid=2483, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 20:34:50,375 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 3382 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 6974 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3386 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 7610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 6974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:34:50,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3386 Valid, 551 Invalid, 7610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 6974 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 20:34:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79295 states. [2023-04-01 20:34:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79295 to 74985. [2023-04-01 20:34:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74985 states, 73395 states have (on average 1.1173513182096872) internal successors, (82008), 74263 states have internal predecessors, (82008), 367 states have call successors, (367), 355 states have call predecessors, (367), 1222 states have return successors, (7962), 366 states have call predecessors, (7962), 366 states have call successors, (7962) [2023-04-01 20:34:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74985 states to 74985 states and 90337 transitions. [2023-04-01 20:34:52,887 INFO L78 Accepts]: Start accepts. Automaton has 74985 states and 90337 transitions. Word has length 303 [2023-04-01 20:34:52,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:34:52,887 INFO L495 AbstractCegarLoop]: Abstraction has 74985 states and 90337 transitions. [2023-04-01 20:34:52,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 32.0) internal successors, (416), 11 states have internal predecessors, (416), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:34:52,887 INFO L276 IsEmpty]: Start isEmpty. Operand 74985 states and 90337 transitions. [2023-04-01 20:34:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-01 20:34:52,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:34:52,962 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:34:52,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 20:34:53,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:53,162 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:34:53,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:34:53,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2015789327, now seen corresponding path program 1 times [2023-04-01 20:34:53,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:34:53,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609435718] [2023-04-01 20:34:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:53,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:34:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:53,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:34:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:53,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:34:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:53,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:34:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:53,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-04-01 20:34:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:53,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 20:34:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 151 proven. 7 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-04-01 20:34:53,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:34:53,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609435718] [2023-04-01 20:34:53,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609435718] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:34:53,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078795061] [2023-04-01 20:34:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:34:53,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:34:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:34:53,957 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:34:53,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:34:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:34:54,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:34:54,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:34:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 20:34:54,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:34:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 153 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-01 20:34:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078795061] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:34:54,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:34:54,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-04-01 20:34:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550562420] [2023-04-01 20:34:54,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:34:54,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:34:54,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:34:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:34:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:34:54,312 INFO L87 Difference]: Start difference. First operand 74985 states and 90337 transitions. Second operand has 8 states, 8 states have (on average 33.75) internal successors, (270), 6 states have internal predecessors, (270), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:35:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:35:01,097 INFO L93 Difference]: Finished difference Result 283485 states and 373123 transitions. [2023-04-01 20:35:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 20:35:01,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 33.75) internal successors, (270), 6 states have internal predecessors, (270), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 324 [2023-04-01 20:35:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:35:01,888 INFO L225 Difference]: With dead ends: 283485 [2023-04-01 20:35:01,889 INFO L226 Difference]: Without dead ends: 210439 [2023-04-01 20:35:02,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:35:02,114 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1271 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:35:02,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 178 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2839 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 20:35:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210439 states. [2023-04-01 20:35:07,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210439 to 205185. [2023-04-01 20:35:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205185 states, 200471 states have (on average 1.1097964294087423) internal successors, (222482), 202958 states have internal predecessors, (222482), 1265 states have call successors, (1265), 962 states have call predecessors, (1265), 3448 states have return successors, (28897), 1264 states have call predecessors, (28897), 1264 states have call successors, (28897) [2023-04-01 20:35:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205185 states to 205185 states and 252644 transitions. [2023-04-01 20:35:08,940 INFO L78 Accepts]: Start accepts. Automaton has 205185 states and 252644 transitions. Word has length 324 [2023-04-01 20:35:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:35:08,941 INFO L495 AbstractCegarLoop]: Abstraction has 205185 states and 252644 transitions. [2023-04-01 20:35:08,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.75) internal successors, (270), 6 states have internal predecessors, (270), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:35:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 205185 states and 252644 transitions. [2023-04-01 20:35:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-04-01 20:35:09,106 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:35:09,107 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:35:09,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 20:35:09,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 20:35:09,308 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:35:09,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:35:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 806979710, now seen corresponding path program 1 times [2023-04-01 20:35:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:35:09,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135269188] [2023-04-01 20:35:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:35:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:35:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:35:10,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:35:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:35:10,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:35:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:35:10,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:35:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:35:10,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-04-01 20:35:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:35:10,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-04-01 20:35:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:35:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 150 proven. 87 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:35:10,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:35:10,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135269188] [2023-04-01 20:35:10,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135269188] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:35:10,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334340472] [2023-04-01 20:35:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:35:10,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:35:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:35:10,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:35:10,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 20:35:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:35:11,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:35:11,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:35:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 20:35:11,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:35:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 20:35:11,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334340472] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:35:11,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:35:11,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2023-04-01 20:35:11,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365236320] [2023-04-01 20:35:11,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:35:11,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 20:35:11,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:35:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 20:35:11,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-04-01 20:35:11,500 INFO L87 Difference]: Start difference. First operand 205185 states and 252644 transitions. Second operand has 19 states, 19 states have (on average 23.263157894736842) internal successors, (442), 17 states have internal predecessors, (442), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 20:36:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:36:29,902 INFO L93 Difference]: Finished difference Result 971099 states and 1556592 transitions. [2023-04-01 20:36:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 312 states. [2023-04-01 20:36:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 23.263157894736842) internal successors, (442), 17 states have internal predecessors, (442), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 330 [2023-04-01 20:36:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:36:39,474 INFO L225 Difference]: With dead ends: 971099 [2023-04-01 20:36:39,474 INFO L226 Difference]: Without dead ends: 767173 [2023-04-01 20:36:40,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1184 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45606 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=7996, Invalid=92176, Unknown=0, NotChecked=0, Total=100172 [2023-04-01 20:36:40,397 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 15060 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 17052 mSolverCounterSat, 3182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15092 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 20234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3182 IncrementalHoareTripleChecker+Valid, 17052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:36:40,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15092 Valid, 1098 Invalid, 20234 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3182 Valid, 17052 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2023-04-01 20:36:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767173 states.