/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/Problem19_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:50:19,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:50:19,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:50:19,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 23:50:19,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 23:50:19,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 23:50:19,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 23:50:19,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 23:50:19,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 23:50:19,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 23:50:19,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 23:50:19,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 23:50:19,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:50:19,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:50:19,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:50:19,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:50:19,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:50:19,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:50:19,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:50:19,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:50:19,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:50:20,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:50:20,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:50:20,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:50:20,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:50:20,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:50:20,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:50:20,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:50:20,019 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 23:50:20,046 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:50:20,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:50:20,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:50:20,047 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:50:20,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:50:20,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:50:20,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:50:20,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:50:20,049 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:50:20,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:50:20,050 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:50:20,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:50:20,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:50:20,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:50:20,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:50:20,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:50:20,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:50:20,051 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:50:20,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:50:20,051 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:50:20,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:50:20,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:50:20,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:50:20,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:50:20,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:50:20,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:50:20,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:50:20,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:50:20,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:50:20,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:50:20,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:50:20,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:50:20,053 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:50:20,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:50:20,053 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:50:20,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:50:20,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:50:20,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:50:20,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:50:20,343 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:50:20,343 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:50:20,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label09.c [2023-04-01 23:50:21,570 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:50:22,113 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:50:22,114 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label09.c [2023-04-01 23:50:22,158 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94aa9670d/e8fb0b4fd1874bc09853e5cb9e6b2ab0/FLAG5a03f5515 [2023-04-01 23:50:22,172 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94aa9670d/e8fb0b4fd1874bc09853e5cb9e6b2ab0 [2023-04-01 23:50:22,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:50:22,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:50:22,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:50:22,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:50:22,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:50:22,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:50:22" (1/1) ... [2023-04-01 23:50:22,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63759f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:22, skipping insertion in model container [2023-04-01 23:50:22,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:50:22" (1/1) ... [2023-04-01 23:50:22,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:50:22,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:50:22,686 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/Problem19_label09.c[6533,6546] [2023-04-01 23:50:23,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:50:23,811 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:50:23,841 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/Problem19_label09.c[6533,6546] [2023-04-01 23:50:24,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:50:24,489 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:50:24,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24 WrapperNode [2023-04-01 23:50:24,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:50:24,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:50:24,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:50:24,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:50:24,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (1/1) ... [2023-04-01 23:50:24,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (1/1) ... [2023-04-01 23:50:24,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (1/1) ... [2023-04-01 23:50:24,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (1/1) ... [2023-04-01 23:50:24,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (1/1) ... [2023-04-01 23:50:24,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (1/1) ... [2023-04-01 23:50:24,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (1/1) ... [2023-04-01 23:50:24,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (1/1) ... [2023-04-01 23:50:25,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:50:25,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:50:25,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:50:25,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:50:25,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (1/1) ... [2023-04-01 23:50:25,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:50:25,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:50:25,094 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 23:50:25,107 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 23:50:25,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:50:25,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:50:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:50:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:50:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:50:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:50:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 23:50:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 23:50:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 23:50:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:50:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:50:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:50:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:50:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:50:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:50:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:50:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:50:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:50:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:50:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:50:25,228 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:50:25,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:50:32,549 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:50:32,565 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:50:32,565 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:50:32,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:50:32 BoogieIcfgContainer [2023-04-01 23:50:32,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:50:32,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:50:32,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:50:32,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:50:32,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:50:22" (1/3) ... [2023-04-01 23:50:32,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391e18fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:50:32, skipping insertion in model container [2023-04-01 23:50:32,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:50:24" (2/3) ... [2023-04-01 23:50:32,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391e18fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:50:32, skipping insertion in model container [2023-04-01 23:50:32,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:50:32" (3/3) ... [2023-04-01 23:50:32,576 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label09.c [2023-04-01 23:50:32,592 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:50:32,592 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:50:32,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:50:32,671 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;@2883e957, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:50:32,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:50:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 23:50:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 23:50:32,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:50:32,689 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] [2023-04-01 23:50:32,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:50:32,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:50:32,694 INFO L85 PathProgramCache]: Analyzing trace with hash 161760912, now seen corresponding path program 1 times [2023-04-01 23:50:32,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:50:32,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424535775] [2023-04-01 23:50:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:50:32,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:50:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:33,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:50:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:33,294 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 23:50:33,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:50:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424535775] [2023-04-01 23:50:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424535775] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:50:33,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:50:33,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:50:33,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719852941] [2023-04-01 23:50:33,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:50:33,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:50:33,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:50:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:50:33,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:50:33,368 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 23:50:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:50:44,406 INFO L93 Difference]: Finished difference Result 5086 states and 9561 transitions. [2023-04-01 23:50:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:50:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 55 [2023-04-01 23:50:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:50:44,440 INFO L225 Difference]: With dead ends: 5086 [2023-04-01 23:50:44,440 INFO L226 Difference]: Without dead ends: 3245 [2023-04-01 23:50:44,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:50:44,451 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 4978 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 9242 mSolverCounterSat, 1365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4978 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 10607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1365 IncrementalHoareTripleChecker+Valid, 9242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:50:44,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4978 Valid, 376 Invalid, 10607 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1365 Valid, 9242 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2023-04-01 23:50:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2023-04-01 23:50:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 3178. [2023-04-01 23:50:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3142 states have (on average 1.846594525779758) internal successors, (5802), 3144 states have internal predecessors, (5802), 14 states have call successors, (14), 14 states have call predecessors, (14), 21 states have return successors, (33), 19 states have call predecessors, (33), 13 states have call successors, (33) [2023-04-01 23:50:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 5849 transitions. [2023-04-01 23:50:44,610 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 5849 transitions. Word has length 55 [2023-04-01 23:50:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:50:44,611 INFO L495 AbstractCegarLoop]: Abstraction has 3178 states and 5849 transitions. [2023-04-01 23:50:44,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 23:50:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 5849 transitions. [2023-04-01 23:50:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 23:50:44,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:50:44,615 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, 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] [2023-04-01 23:50:44,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:50:44,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:50:44,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:50:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash 537572584, now seen corresponding path program 1 times [2023-04-01 23:50:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:50:44,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267179625] [2023-04-01 23:50:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:50:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:50:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:44,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:50:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:44,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:50:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:50:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:50:44,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:50:44,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267179625] [2023-04-01 23:50:44,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267179625] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:50:44,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:50:44,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:50:44,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982508213] [2023-04-01 23:50:44,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:50:44,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:50:44,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:50:44,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:50:44,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:50:44,942 INFO L87 Difference]: Start difference. First operand 3178 states and 5849 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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 23:51:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:51:04,733 INFO L93 Difference]: Finished difference Result 16333 states and 30897 transitions. [2023-04-01 23:51:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 23:51:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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 126 [2023-04-01 23:51:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:51:04,876 INFO L225 Difference]: With dead ends: 16333 [2023-04-01 23:51:04,882 INFO L226 Difference]: Without dead ends: 13161 [2023-04-01 23:51:04,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:51:04,896 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 21914 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 15083 mSolverCounterSat, 5200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21914 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 20283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5200 IncrementalHoareTripleChecker+Valid, 15083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:51:04,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21914 Valid, 1035 Invalid, 20283 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5200 Valid, 15083 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2023-04-01 23:51:04,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13161 states. [2023-04-01 23:51:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13161 to 13115. [2023-04-01 23:51:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13115 states, 12949 states have (on average 1.535717043787165) internal successors, (19886), 12958 states have internal predecessors, (19886), 56 states have call successors, (56), 56 states have call predecessors, (56), 109 states have return successors, (550), 100 states have call predecessors, (550), 55 states have call successors, (550) [2023-04-01 23:51:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13115 states to 13115 states and 20492 transitions. [2023-04-01 23:51:05,212 INFO L78 Accepts]: Start accepts. Automaton has 13115 states and 20492 transitions. Word has length 126 [2023-04-01 23:51:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:51:05,214 INFO L495 AbstractCegarLoop]: Abstraction has 13115 states and 20492 transitions. [2023-04-01 23:51:05,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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 23:51:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 13115 states and 20492 transitions. [2023-04-01 23:51:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 23:51:05,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:51:05,224 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, 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] [2023-04-01 23:51:05,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:51:05,224 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:51:05,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:51:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1788095092, now seen corresponding path program 1 times [2023-04-01 23:51:05,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:51:05,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408162351] [2023-04-01 23:51:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:05,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:51:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:05,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:51:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:05,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:51:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:51:05,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:51:05,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408162351] [2023-04-01 23:51:05,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408162351] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:51:05,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:51:05,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:51:05,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404754821] [2023-04-01 23:51:05,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:51:05,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:51:05,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:51:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:51:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:51:05,742 INFO L87 Difference]: Start difference. First operand 13115 states and 20492 transitions. Second operand has 7 states, 6 states have (on average 25.166666666666668) internal successors, (151), 4 states have internal predecessors, (151), 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 23:51:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:51:16,591 INFO L93 Difference]: Finished difference Result 39768 states and 64509 transitions. [2023-04-01 23:51:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:51:16,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 25.166666666666668) internal successors, (151), 4 states have internal predecessors, (151), 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 157 [2023-04-01 23:51:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:51:16,678 INFO L225 Difference]: With dead ends: 39768 [2023-04-01 23:51:16,678 INFO L226 Difference]: Without dead ends: 26659 [2023-04-01 23:51:16,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:51:16,719 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 8831 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 9523 mSolverCounterSat, 2457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8831 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 11980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2457 IncrementalHoareTripleChecker+Valid, 9523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:51:16,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8831 Valid, 952 Invalid, 11980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2457 Valid, 9523 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2023-04-01 23:51:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26659 states. [2023-04-01 23:51:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26659 to 26416. [2023-04-01 23:51:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26416 states, 25924 states have (on average 1.348248727048295) internal successors, (34952), 25981 states have internal predecessors, (34952), 110 states have call successors, (110), 110 states have call predecessors, (110), 381 states have return successors, (2637), 324 states have call predecessors, (2637), 109 states have call successors, (2637) [2023-04-01 23:51:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26416 states to 26416 states and 37699 transitions. [2023-04-01 23:51:17,351 INFO L78 Accepts]: Start accepts. Automaton has 26416 states and 37699 transitions. Word has length 157 [2023-04-01 23:51:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:51:17,353 INFO L495 AbstractCegarLoop]: Abstraction has 26416 states and 37699 transitions. [2023-04-01 23:51:17,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 25.166666666666668) internal successors, (151), 4 states have internal predecessors, (151), 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 23:51:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 26416 states and 37699 transitions. [2023-04-01 23:51:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-04-01 23:51:17,358 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:51:17,358 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, 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] [2023-04-01 23:51:17,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:51:17,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:51:17,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:51:17,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1132814066, now seen corresponding path program 1 times [2023-04-01 23:51:17,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:51:17,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421538459] [2023-04-01 23:51:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:17,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:51:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:17,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:51:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:17,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:51:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:51:17,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:51:17,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421538459] [2023-04-01 23:51:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421538459] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:51:17,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:51:17,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:51:17,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982528218] [2023-04-01 23:51:17,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:51:17,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 23:51:17,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:51:17,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 23:51:17,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:51:17,953 INFO L87 Difference]: Start difference. First operand 26416 states and 37699 transitions. Second operand has 8 states, 7 states have (on average 27.285714285714285) internal successors, (191), 5 states have internal predecessors, (191), 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 23:51:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:51:27,989 INFO L93 Difference]: Finished difference Result 62228 states and 90749 transitions. [2023-04-01 23:51:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:51:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 27.285714285714285) internal successors, (191), 5 states have internal predecessors, (191), 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 197 [2023-04-01 23:51:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:51:28,110 INFO L225 Difference]: With dead ends: 62228 [2023-04-01 23:51:28,110 INFO L226 Difference]: Without dead ends: 35818 [2023-04-01 23:51:28,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:51:28,171 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 8267 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 11429 mSolverCounterSat, 2016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8267 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 13445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2016 IncrementalHoareTripleChecker+Valid, 11429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:51:28,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8267 Valid, 965 Invalid, 13445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2016 Valid, 11429 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-04-01 23:51:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35818 states. [2023-04-01 23:51:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35818 to 35676. [2023-04-01 23:51:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35676 states, 34776 states have (on average 1.247642051989878) internal successors, (43388), 34908 states have internal predecessors, (43388), 146 states have call successors, (146), 146 states have call predecessors, (146), 753 states have return successors, (4810), 621 states have call predecessors, (4810), 145 states have call successors, (4810) [2023-04-01 23:51:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35676 states to 35676 states and 48344 transitions. [2023-04-01 23:51:29,010 INFO L78 Accepts]: Start accepts. Automaton has 35676 states and 48344 transitions. Word has length 197 [2023-04-01 23:51:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:51:29,011 INFO L495 AbstractCegarLoop]: Abstraction has 35676 states and 48344 transitions. [2023-04-01 23:51:29,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 27.285714285714285) internal successors, (191), 5 states have internal predecessors, (191), 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 23:51:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 35676 states and 48344 transitions. [2023-04-01 23:51:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 23:51:29,014 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:51:29,014 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, 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] [2023-04-01 23:51:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 23:51:29,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:51:29,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:51:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1705934593, now seen corresponding path program 1 times [2023-04-01 23:51:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:51:29,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108121369] [2023-04-01 23:51:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:51:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:29,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:51:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:29,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:51:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:51:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:51:29,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108121369] [2023-04-01 23:51:29,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108121369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:51:29,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:51:29,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:51:29,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560422665] [2023-04-01 23:51:29,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:51:29,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:51:29,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:51:29,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:51:29,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:51:29,540 INFO L87 Difference]: Start difference. First operand 35676 states and 48344 transitions. Second operand has 7 states, 6 states have (on average 35.166666666666664) internal successors, (211), 4 states have internal predecessors, (211), 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 23:51:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:51:42,121 INFO L93 Difference]: Finished difference Result 103887 states and 151572 transitions. [2023-04-01 23:51:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:51:42,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 35.166666666666664) internal successors, (211), 4 states have internal predecessors, (211), 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 217 [2023-04-01 23:51:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:51:42,352 INFO L225 Difference]: With dead ends: 103887 [2023-04-01 23:51:42,352 INFO L226 Difference]: Without dead ends: 68217 [2023-04-01 23:51:42,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:51:42,416 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 8127 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 11467 mSolverCounterSat, 2115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8127 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 13582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2115 IncrementalHoareTripleChecker+Valid, 11467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:51:42,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8127 Valid, 1105 Invalid, 13582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2115 Valid, 11467 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2023-04-01 23:51:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68217 states. [2023-04-01 23:51:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68217 to 67574. [2023-04-01 23:51:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67574 states, 65454 states have (on average 1.1703333638891436) internal successors, (76603), 65829 states have internal predecessors, (76603), 272 states have call successors, (272), 272 states have call predecessors, (272), 1847 states have return successors, (13652), 1472 states have call predecessors, (13652), 271 states have call successors, (13652) [2023-04-01 23:51:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67574 states to 67574 states and 90527 transitions. [2023-04-01 23:51:44,047 INFO L78 Accepts]: Start accepts. Automaton has 67574 states and 90527 transitions. Word has length 217 [2023-04-01 23:51:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:51:44,048 INFO L495 AbstractCegarLoop]: Abstraction has 67574 states and 90527 transitions. [2023-04-01 23:51:44,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 35.166666666666664) internal successors, (211), 4 states have internal predecessors, (211), 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 23:51:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 67574 states and 90527 transitions. [2023-04-01 23:51:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-04-01 23:51:44,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:51:44,056 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:44,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 23:51:44,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:51:44,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:51:44,059 INFO L85 PathProgramCache]: Analyzing trace with hash 129559610, now seen corresponding path program 1 times [2023-04-01 23:51:44,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:51:44,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219651561] [2023-04-01 23:51:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:44,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:51:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:44,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:51:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:44,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:51:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:44,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 23:51:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 96 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:51:45,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:51:45,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219651561] [2023-04-01 23:51:45,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219651561] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:51:45,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225848682] [2023-04-01 23:51:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:45,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:51:45,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:51:45,066 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 23:51:45,070 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 23:51:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:45,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:51:45,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:51:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 23:51:45,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:51:45,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225848682] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:51:45,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:51:45,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-04-01 23:51:45,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021181927] [2023-04-01 23:51:45,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:51:45,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:51:45,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:51:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:51:45,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:51:45,619 INFO L87 Difference]: Start difference. First operand 67574 states and 90527 transitions. Second operand has 5 states, 5 states have (on average 62.6) internal successors, (313), 4 states have internal predecessors, (313), 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 23:51:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:51:54,989 INFO L93 Difference]: Finished difference Result 200556 states and 278258 transitions. [2023-04-01 23:51:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 23:51:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 4 states have internal predecessors, (313), 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 368 [2023-04-01 23:51:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:51:55,498 INFO L225 Difference]: With dead ends: 200556 [2023-04-01 23:51:55,498 INFO L226 Difference]: Without dead ends: 132988 [2023-04-01 23:51:55,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:51:55,591 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 7717 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 8320 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7717 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 9217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 8320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:51:55,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7717 Valid, 986 Invalid, 9217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [897 Valid, 8320 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-04-01 23:51:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132988 states. [2023-04-01 23:51:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132988 to 118454. [2023-04-01 23:51:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118454 states, 114667 states have (on average 1.1604820916218266) internal successors, (133069), 115356 states have internal predecessors, (133069), 476 states have call successors, (476), 476 states have call predecessors, (476), 3310 states have return successors, (23463), 2621 states have call predecessors, (23463), 475 states have call successors, (23463) [2023-04-01 23:51:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118454 states to 118454 states and 157008 transitions. [2023-04-01 23:51:59,586 INFO L78 Accepts]: Start accepts. Automaton has 118454 states and 157008 transitions. Word has length 368 [2023-04-01 23:51:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:51:59,586 INFO L495 AbstractCegarLoop]: Abstraction has 118454 states and 157008 transitions. [2023-04-01 23:51:59,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 4 states have internal predecessors, (313), 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 23:51:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 118454 states and 157008 transitions. [2023-04-01 23:51:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2023-04-01 23:51:59,602 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:51:59,603 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:59,629 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 23:51:59,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 23:51:59,804 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:51:59,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:51:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1066190924, now seen corresponding path program 1 times [2023-04-01 23:51:59,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:51:59,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685510480] [2023-04-01 23:51:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:59,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:51:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:01,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:52:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:01,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:52:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:01,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:52:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:02,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:52:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 254 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:52:02,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:52:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685510480] [2023-04-01 23:52:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685510480] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:52:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167938751] [2023-04-01 23:52:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:52:02,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:52:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:52:02,709 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 23:52:02,712 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 23:52:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:02,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:52:02,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:52:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:52:03,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:52:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:52:08,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167938751] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:52:08,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:52:08,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-04-01 23:52:08,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916927766] [2023-04-01 23:52:08,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:52:08,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 23:52:08,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:52:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 23:52:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:52:08,752 INFO L87 Difference]: Start difference. First operand 118454 states and 157008 transitions. Second operand has 15 states, 15 states have (on average 81.8) internal successors, (1227), 13 states have internal predecessors, (1227), 6 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 23:53:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:53:00,814 INFO L93 Difference]: Finished difference Result 383531 states and 554802 transitions. [2023-04-01 23:53:00,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-04-01 23:53:00,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 81.8) internal successors, (1227), 13 states have internal predecessors, (1227), 6 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 761 [2023-04-01 23:53:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:53:01,879 INFO L225 Difference]: With dead ends: 383531 [2023-04-01 23:53:01,879 INFO L226 Difference]: Without dead ends: 262196 [2023-04-01 23:53:02,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1664 GetRequests, 1554 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4613 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1875, Invalid=10335, Unknown=0, NotChecked=0, Total=12210 [2023-04-01 23:53:02,071 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 40627 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 48117 mSolverCounterSat, 21871 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40634 SdHoareTripleChecker+Valid, 2819 SdHoareTripleChecker+Invalid, 69988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 21871 IncrementalHoareTripleChecker+Valid, 48117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:53:02,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40634 Valid, 2819 Invalid, 69988 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [21871 Valid, 48117 Invalid, 0 Unknown, 0 Unchecked, 44.3s Time] [2023-04-01 23:53:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262196 states. [2023-04-01 23:53:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262196 to 234563. [2023-04-01 23:53:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234563 states, 227994 states have (on average 1.1487363702553577) internal successors, (261905), 229206 states have internal predecessors, (261905), 956 states have call successors, (956), 956 states have call predecessors, (956), 5612 states have return successors, (62528), 4400 states have call predecessors, (62528), 955 states have call successors, (62528) [2023-04-01 23:53:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234563 states to 234563 states and 325389 transitions. [2023-04-01 23:53:09,281 INFO L78 Accepts]: Start accepts. Automaton has 234563 states and 325389 transitions. Word has length 761 [2023-04-01 23:53:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:53:09,282 INFO L495 AbstractCegarLoop]: Abstraction has 234563 states and 325389 transitions. [2023-04-01 23:53:09,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.8) internal successors, (1227), 13 states have internal predecessors, (1227), 6 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 23:53:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 234563 states and 325389 transitions. [2023-04-01 23:53:09,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2023-04-01 23:53:09,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:53:09,307 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:53:09,315 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 23:53:09,507 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,SelfDestructingSolverStorable6 [2023-04-01 23:53:09,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:53:09,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:53:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2128592266, now seen corresponding path program 1 times [2023-04-01 23:53:09,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:53:09,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264768716] [2023-04-01 23:53:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:53:09,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:53:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:12,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:53:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:12,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:53:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:12,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:53:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:13,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:53:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:14,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:53:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 471 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 23:53:14,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:53:14,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264768716] [2023-04-01 23:53:14,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264768716] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:53:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538358869] [2023-04-01 23:53:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:53:14,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:53:14,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:53:14,401 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 23:53:14,403 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 23:53:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:14,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:53:14,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:53:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 523 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:53:16,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:53:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 523 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:53:24,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538358869] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:53:24,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:53:24,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 6] total 17 [2023-04-01 23:53:24,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068801761] [2023-04-01 23:53:24,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:53:24,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 23:53:24,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:53:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 23:53:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 23:53:24,962 INFO L87 Difference]: Start difference. First operand 234563 states and 325389 transitions. Second operand has 17 states, 17 states have (on average 110.70588235294117) internal successors, (1882), 15 states have internal predecessors, (1882), 9 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13)