/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/Problem17_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:31:48,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:31:48,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:31:48,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 23:31:48,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 23:31:48,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 23:31:48,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 23:31:48,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 23:31:48,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 23:31:48,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 23:31:48,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 23:31:48,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 23:31:48,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:31:49,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:31:49,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:31:49,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:31:49,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:31:49,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:31:49,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:31:49,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:31:49,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:31:49,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:31:49,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:31:49,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:31:49,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 23:31:49,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 23:31:49,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 23:31:49,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 23:31:49,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 23:31:49,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 23:31:49,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 23:31:49,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 23:31:49,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 23:31:49,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 23:31:49,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 23:31:49,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 23:31:49,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 23:31:49,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 23:31:49,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:31:49,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:31:49,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:31:49,028 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 23:31:49,051 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:31:49,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:31:49,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:31:49,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:31:49,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:31:49,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:31:49,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:31:49,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:31:49,053 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:31:49,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:31:49,053 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:31:49,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:31:49,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:31:49,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:31:49,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:31:49,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:31:49,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:31:49,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:31:49,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:31:49,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:31:49,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:31:49,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:31:49,056 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:31:49,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:31:49,056 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:31:49,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:31:49,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:31:49,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:31:49,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:31:49,251 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:31:49,251 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:31:49,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label46.c [2023-04-01 23:31:50,336 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:31:50,605 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:31:50,605 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label46.c [2023-04-01 23:31:50,627 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df676ccb/d730a72fbe474d91a1f8f876fb1f8d11/FLAGcc6004895 [2023-04-01 23:31:50,642 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df676ccb/d730a72fbe474d91a1f8f876fb1f8d11 [2023-04-01 23:31:50,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:31:50,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:31:50,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:31:50,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:31:50,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:31:50,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:31:50" (1/1) ... [2023-04-01 23:31:50,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290b9435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:50, skipping insertion in model container [2023-04-01 23:31:50,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:31:50" (1/1) ... [2023-04-01 23:31:50,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:31:50,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:31:50,895 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/Problem17_label46.c[1649,1662] [2023-04-01 23:31:51,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:31:51,439 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:31:51,454 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/Problem17_label46.c[1649,1662] [2023-04-01 23:31:51,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:31:51,670 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:31:51,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51 WrapperNode [2023-04-01 23:31:51,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:31:51,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:31:51,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:31:51,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:31:51,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (1/1) ... [2023-04-01 23:31:51,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (1/1) ... [2023-04-01 23:31:51,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (1/1) ... [2023-04-01 23:31:51,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (1/1) ... [2023-04-01 23:31:51,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (1/1) ... [2023-04-01 23:31:51,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (1/1) ... [2023-04-01 23:31:51,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (1/1) ... [2023-04-01 23:31:51,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (1/1) ... [2023-04-01 23:31:51,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:31:51,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:31:51,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:31:51,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:31:51,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (1/1) ... [2023-04-01 23:31:51,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:31:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:31:51,903 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 23:31:51,928 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 23:31:51,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:31:51,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:31:51,945 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:31:51,945 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:31:51,945 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:31:51,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:31:51,945 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:31:51,945 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:31:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:31:52,007 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:31:52,009 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:31:54,576 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:31:54,588 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:31:54,588 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:31:54,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:31:54 BoogieIcfgContainer [2023-04-01 23:31:54,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:31:54,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:31:54,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:31:54,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:31:54,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:31:50" (1/3) ... [2023-04-01 23:31:54,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a465131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:31:54, skipping insertion in model container [2023-04-01 23:31:54,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:31:51" (2/3) ... [2023-04-01 23:31:54,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a465131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:31:54, skipping insertion in model container [2023-04-01 23:31:54,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:31:54" (3/3) ... [2023-04-01 23:31:54,597 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label46.c [2023-04-01 23:31:54,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:31:54,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:31:54,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:31:54,655 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;@5288dd21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:31:54,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:31:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:31:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 23:31:54,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:31:54,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:31:54,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:31:54,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:31:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1073521970, now seen corresponding path program 1 times [2023-04-01 23:31:54,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:31:54,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89738520] [2023-04-01 23:31:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:31:54,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:31:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:31:55,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:31:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:31:55,044 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 23:31:55,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:31:55,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89738520] [2023-04-01 23:31:55,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89738520] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:31:55,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:31:55,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:31:55,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225560715] [2023-04-01 23:31:55,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:31:55,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:31:55,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:31:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:31:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:31:55,072 INFO L87 Difference]: Start difference. First operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 23:31:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:31:58,665 INFO L93 Difference]: Finished difference Result 1716 states and 3126 transitions. [2023-04-01 23:31:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:31:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2023-04-01 23:31:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:31:58,685 INFO L225 Difference]: With dead ends: 1716 [2023-04-01 23:31:58,685 INFO L226 Difference]: Without dead ends: 1034 [2023-04-01 23:31:58,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:31:58,697 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1587 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:31:58,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1587 Valid, 134 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 23:31:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2023-04-01 23:31:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1008. [2023-04-01 23:31:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 994 states have (on average 1.6981891348088531) internal successors, (1688), 995 states have internal predecessors, (1688), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 23:31:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1705 transitions. [2023-04-01 23:31:58,781 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1705 transitions. Word has length 16 [2023-04-01 23:31:58,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:31:58,781 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1705 transitions. [2023-04-01 23:31:58,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 23:31:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1705 transitions. [2023-04-01 23:31:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 23:31:58,784 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:31:58,784 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 23:31:58,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:31:58,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:31:58,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:31:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash -317776466, now seen corresponding path program 1 times [2023-04-01 23:31:58,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:31:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443454834] [2023-04-01 23:31:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:31:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:31:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:31:59,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:31:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:31:59,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:31:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:31:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:31:59,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:31:59,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443454834] [2023-04-01 23:31:59,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443454834] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:31:59,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:31:59,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:31:59,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258377212] [2023-04-01 23:31:59,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:31:59,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:31:59,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:31:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:31:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:31:59,195 INFO L87 Difference]: Start difference. First operand 1008 states and 1705 transitions. Second operand has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 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 23:32:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:32:03,518 INFO L93 Difference]: Finished difference Result 3005 states and 5131 transitions. [2023-04-01 23:32:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:32:03,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 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 85 [2023-04-01 23:32:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:32:03,526 INFO L225 Difference]: With dead ends: 3005 [2023-04-01 23:32:03,526 INFO L226 Difference]: Without dead ends: 2003 [2023-04-01 23:32:03,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:32:03,529 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 1588 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 4460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 4066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:32:03,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1588 Valid, 390 Invalid, 4460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 23:32:03,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2023-04-01 23:32:03,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1951. [2023-04-01 23:32:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1912 states have (on average 1.4743723849372385) internal successors, (2819), 1922 states have internal predecessors, (2819), 10 states have call successors, (10), 10 states have call predecessors, (10), 28 states have return successors, (62), 18 states have call predecessors, (62), 9 states have call successors, (62) [2023-04-01 23:32:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2891 transitions. [2023-04-01 23:32:03,596 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2891 transitions. Word has length 85 [2023-04-01 23:32:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:32:03,596 INFO L495 AbstractCegarLoop]: Abstraction has 1951 states and 2891 transitions. [2023-04-01 23:32:03,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 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 23:32:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2891 transitions. [2023-04-01 23:32:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 23:32:03,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:32:03,601 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 23:32:03,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:32:03,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:32:03,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:32:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1054597478, now seen corresponding path program 1 times [2023-04-01 23:32:03,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:32:03,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876454874] [2023-04-01 23:32:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:32:03,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:32:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:03,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:32:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:32:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:32:03,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:32:03,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876454874] [2023-04-01 23:32:03,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876454874] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:32:03,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:32:03,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:32:03,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703807401] [2023-04-01 23:32:03,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:32:03,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:32:03,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:32:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:32:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:32:03,864 INFO L87 Difference]: Start difference. First operand 1951 states and 2891 transitions. Second operand has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 4 states have internal predecessors, (89), 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 23:32:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:32:07,337 INFO L93 Difference]: Finished difference Result 5814 states and 8751 transitions. [2023-04-01 23:32:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:32:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 4 states have internal predecessors, (89), 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 95 [2023-04-01 23:32:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:32:07,349 INFO L225 Difference]: With dead ends: 5814 [2023-04-01 23:32:07,349 INFO L226 Difference]: Without dead ends: 3869 [2023-04-01 23:32:07,352 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 23:32:07,353 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1652 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 3165 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 3904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 3165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:32:07,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 269 Invalid, 3904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [739 Valid, 3165 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 23:32:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3869 states. [2023-04-01 23:32:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3869 to 2880. [2023-04-01 23:32:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2880 states, 2807 states have (on average 1.322764517278233) internal successors, (3713), 2832 states have internal predecessors, (3713), 14 states have call successors, (14), 14 states have call predecessors, (14), 58 states have return successors, (143), 33 states have call predecessors, (143), 13 states have call successors, (143) [2023-04-01 23:32:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3870 transitions. [2023-04-01 23:32:07,410 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3870 transitions. Word has length 95 [2023-04-01 23:32:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:32:07,411 INFO L495 AbstractCegarLoop]: Abstraction has 2880 states and 3870 transitions. [2023-04-01 23:32:07,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 4 states have internal predecessors, (89), 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 23:32:07,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3870 transitions. [2023-04-01 23:32:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-04-01 23:32:07,413 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:32:07,413 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 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 23:32:07,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:32:07,413 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:32:07,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:32:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1305170190, now seen corresponding path program 1 times [2023-04-01 23:32:07,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:32:07,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403672755] [2023-04-01 23:32:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:32:07,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:32:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:07,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:32:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:07,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:32:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:07,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:32:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:32:07,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:32:07,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403672755] [2023-04-01 23:32:07,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403672755] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:32:07,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102312749] [2023-04-01 23:32:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:32:07,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:32:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:32:07,705 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 23:32:07,706 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 23:32:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:07,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:32:07,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:32:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:32:07,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:32:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:32:08,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102312749] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:32:08,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:32:08,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:32:08,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558462853] [2023-04-01 23:32:08,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:32:08,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:32:08,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:32:08,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:32:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:32:08,212 INFO L87 Difference]: Start difference. First operand 2880 states and 3870 transitions. Second operand has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 9 states have internal predecessors, (298), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 23:32:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:32:12,701 INFO L93 Difference]: Finished difference Result 7617 states and 10723 transitions. [2023-04-01 23:32:12,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 23:32:12,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 9 states have internal predecessors, (298), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 172 [2023-04-01 23:32:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:32:12,727 INFO L225 Difference]: With dead ends: 7617 [2023-04-01 23:32:12,727 INFO L226 Difference]: Without dead ends: 4743 [2023-04-01 23:32:12,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 346 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 23:32:12,737 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 3647 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 5375 mSolverCounterSat, 1342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 6717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1342 IncrementalHoareTripleChecker+Valid, 5375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:32:12,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3647 Valid, 395 Invalid, 6717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1342 Valid, 5375 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 23:32:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2023-04-01 23:32:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 4710. [2023-04-01 23:32:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4710 states, 4583 states have (on average 1.2969670521492471) internal successors, (5944), 4627 states have internal predecessors, (5944), 22 states have call successors, (22), 22 states have call predecessors, (22), 104 states have return successors, (344), 60 states have call predecessors, (344), 21 states have call successors, (344) [2023-04-01 23:32:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 6310 transitions. [2023-04-01 23:32:12,831 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 6310 transitions. Word has length 172 [2023-04-01 23:32:12,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:32:12,832 INFO L495 AbstractCegarLoop]: Abstraction has 4710 states and 6310 transitions. [2023-04-01 23:32:12,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 9 states have internal predecessors, (298), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 23:32:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 6310 transitions. [2023-04-01 23:32:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-04-01 23:32:12,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:32:12,834 INFO L195 NwaCegarLoop]: trace histogram [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, 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 23:32:12,841 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 23:32:13,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:32:13,041 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:32:13,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:32:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash 319955686, now seen corresponding path program 1 times [2023-04-01 23:32:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:32:13,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192788555] [2023-04-01 23:32:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:32:13,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:32:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:13,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:32:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:13,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:32:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:13,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:32:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 23:32:13,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:32:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192788555] [2023-04-01 23:32:13,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192788555] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:32:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374289016] [2023-04-01 23:32:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:32:13,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:32:13,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:32:13,261 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 23:32:13,265 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 23:32:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:13,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:32:13,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:32:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 23:32:13,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:32:13,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374289016] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:32:13,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:32:13,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:32:13,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464740541] [2023-04-01 23:32:13,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:32:13,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:32:13,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:32:13,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:32:13,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:32:13,376 INFO L87 Difference]: Start difference. First operand 4710 states and 6310 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:32:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:32:15,249 INFO L93 Difference]: Finished difference Result 12957 states and 17776 transitions. [2023-04-01 23:32:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:32:15,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 178 [2023-04-01 23:32:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:32:15,280 INFO L225 Difference]: With dead ends: 12957 [2023-04-01 23:32:15,280 INFO L226 Difference]: Without dead ends: 8253 [2023-04-01 23:32:15,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:32:15,290 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 444 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:32:15,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 562 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 23:32:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8253 states. [2023-04-01 23:32:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8253 to 7815. [2023-04-01 23:32:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7815 states, 7627 states have (on average 1.2135833224072374) internal successors, (9256), 7691 states have internal predecessors, (9256), 36 states have call successors, (36), 36 states have call predecessors, (36), 151 states have return successors, (673), 87 states have call predecessors, (673), 35 states have call successors, (673) [2023-04-01 23:32:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 9965 transitions. [2023-04-01 23:32:15,417 INFO L78 Accepts]: Start accepts. Automaton has 7815 states and 9965 transitions. Word has length 178 [2023-04-01 23:32:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:32:15,417 INFO L495 AbstractCegarLoop]: Abstraction has 7815 states and 9965 transitions. [2023-04-01 23:32:15,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:32:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 7815 states and 9965 transitions. [2023-04-01 23:32:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-04-01 23:32:15,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:32:15,419 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:32:15,426 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 23:32:15,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:32:15,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:32:15,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:32:15,624 INFO L85 PathProgramCache]: Analyzing trace with hash -862470061, now seen corresponding path program 1 times [2023-04-01 23:32:15,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:32:15,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003510248] [2023-04-01 23:32:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:32:15,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:32:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:15,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:32:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:15,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:32:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:15,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:32:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:32:15,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:32:15,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003510248] [2023-04-01 23:32:15,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003510248] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:32:15,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114681996] [2023-04-01 23:32:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:32:15,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:32:15,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:32:15,835 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 23:32:15,837 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 23:32:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:15,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:32:15,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:32:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:32:15,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:32:15,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114681996] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:32:15,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:32:15,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:32:15,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68680762] [2023-04-01 23:32:15,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:32:15,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:32:15,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:32:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:32:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:32:15,944 INFO L87 Difference]: Start difference. First operand 7815 states and 9965 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:32:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:32:17,968 INFO L93 Difference]: Finished difference Result 19619 states and 25645 transitions. [2023-04-01 23:32:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:32:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 191 [2023-04-01 23:32:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:32:18,008 INFO L225 Difference]: With dead ends: 19619 [2023-04-01 23:32:18,008 INFO L226 Difference]: Without dead ends: 10406 [2023-04-01 23:32:18,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:32:18,018 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 585 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:32:18,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 662 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 23:32:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2023-04-01 23:32:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 9526. [2023-04-01 23:32:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9526 states, 9318 states have (on average 1.1574372182871862) internal successors, (10785), 9385 states have internal predecessors, (10785), 44 states have call successors, (44), 44 states have call predecessors, (44), 163 states have return successors, (908), 96 states have call predecessors, (908), 43 states have call successors, (908) [2023-04-01 23:32:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9526 states to 9526 states and 11737 transitions. [2023-04-01 23:32:18,173 INFO L78 Accepts]: Start accepts. Automaton has 9526 states and 11737 transitions. Word has length 191 [2023-04-01 23:32:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:32:18,174 INFO L495 AbstractCegarLoop]: Abstraction has 9526 states and 11737 transitions. [2023-04-01 23:32:18,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:32:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 9526 states and 11737 transitions. [2023-04-01 23:32:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-04-01 23:32:18,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:32:18,177 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:18,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:32:18,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:32:18,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:32:18,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:32:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash -784112115, now seen corresponding path program 1 times [2023-04-01 23:32:18,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:32:18,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535194383] [2023-04-01 23:32:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:32:18,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:32:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:18,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:32:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:18,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:32:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:18,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:32:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:32:18,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:32:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535194383] [2023-04-01 23:32:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535194383] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:32:18,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031497118] [2023-04-01 23:32:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:32:18,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:32:18,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:32:18,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:32:18,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:32:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:32:18,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 23:32:18,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:32:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 23:32:19,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:32:19,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031497118] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:32:19,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:32:19,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2023-04-01 23:32:19,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648337685] [2023-04-01 23:32:19,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:32:19,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 23:32:19,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:32:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 23:32:19,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:32:19,690 INFO L87 Difference]: Start difference. First operand 9526 states and 11737 transitions. Second operand has 10 states, 10 states have (on average 30.9) internal successors, (309), 8 states have internal predecessors, (309), 5 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:32:24,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:29,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:32,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:34,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:37,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:39,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:41,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:44,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:46,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:48,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:51,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:53,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:56,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:32:58,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:00,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:02,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:04,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:06,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:08,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:33:08,551 INFO L93 Difference]: Finished difference Result 35575 states and 46048 transitions. [2023-04-01 23:33:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:33:08,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 30.9) internal successors, (309), 8 states have internal predecessors, (309), 5 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 244 [2023-04-01 23:33:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:33:08,612 INFO L225 Difference]: With dead ends: 35575 [2023-04-01 23:33:08,612 INFO L226 Difference]: Without dead ends: 24261 [2023-04-01 23:33:08,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 407 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2023-04-01 23:33:08,633 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3550 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 5233 mSolverCounterSat, 945 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3553 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 6197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 945 IncrementalHoareTripleChecker+Valid, 5233 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:33:08,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3553 Valid, 302 Invalid, 6197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [945 Valid, 5233 Invalid, 19 Unknown, 0 Unchecked, 46.3s Time] [2023-04-01 23:33:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24261 states. [2023-04-01 23:33:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24261 to 23754. [2023-04-01 23:33:09,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23754 states, 23262 states have (on average 1.1133178574499183) internal successors, (25898), 23439 states have internal predecessors, (25898), 108 states have call successors, (108), 108 states have call predecessors, (108), 383 states have return successors, (2878), 206 states have call predecessors, (2878), 107 states have call successors, (2878) [2023-04-01 23:33:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23754 states to 23754 states and 28884 transitions. [2023-04-01 23:33:09,066 INFO L78 Accepts]: Start accepts. Automaton has 23754 states and 28884 transitions. Word has length 244 [2023-04-01 23:33:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:33:09,066 INFO L495 AbstractCegarLoop]: Abstraction has 23754 states and 28884 transitions. [2023-04-01 23:33:09,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.9) internal successors, (309), 8 states have internal predecessors, (309), 5 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:33:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 23754 states and 28884 transitions. [2023-04-01 23:33:09,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-04-01 23:33:09,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:33:09,072 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:33:09,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:33:09,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:33:09,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:33:09,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:33:09,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1049107425, now seen corresponding path program 1 times [2023-04-01 23:33:09,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:33:09,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506851706] [2023-04-01 23:33:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:33:09,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:33:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:09,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:33:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:09,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:33:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:33:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:09,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2023-04-01 23:33:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 115 proven. 106 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-04-01 23:33:09,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:33:09,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506851706] [2023-04-01 23:33:09,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506851706] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:33:09,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210565672] [2023-04-01 23:33:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:33:09,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:33:09,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:33:09,787 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:33:09,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:33:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:09,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:33:09,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:33:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:33:10,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:33:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:33:10,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210565672] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:33:10,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:33:10,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:33:10,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063479308] [2023-04-01 23:33:10,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:33:10,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:33:10,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:33:10,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:33:10,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:33:10,623 INFO L87 Difference]: Start difference. First operand 23754 states and 28884 transitions. Second operand has 12 states, 12 states have (on average 49.75) internal successors, (597), 10 states have internal predecessors, (597), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:33:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:33:16,736 INFO L93 Difference]: Finished difference Result 70083 states and 87746 transitions. [2023-04-01 23:33:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 23:33:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 49.75) internal successors, (597), 10 states have internal predecessors, (597), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 369 [2023-04-01 23:33:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:33:16,852 INFO L225 Difference]: With dead ends: 70083 [2023-04-01 23:33:16,852 INFO L226 Difference]: Without dead ends: 46335 [2023-04-01 23:33:16,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 753 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2023-04-01 23:33:16,893 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 2547 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 7494 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2549 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 7946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 7494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:33:16,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2549 Valid, 392 Invalid, 7946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 7494 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-04-01 23:33:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46335 states. [2023-04-01 23:33:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46335 to 38818. [2023-04-01 23:33:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38818 states, 38050 states have (on average 1.0931143232588698) internal successors, (41593), 38336 states have internal predecessors, (41593), 176 states have call successors, (176), 176 states have call predecessors, (176), 591 states have return successors, (4966), 305 states have call predecessors, (4966), 175 states have call successors, (4966) [2023-04-01 23:33:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38818 states to 38818 states and 46735 transitions. [2023-04-01 23:33:17,689 INFO L78 Accepts]: Start accepts. Automaton has 38818 states and 46735 transitions. Word has length 369 [2023-04-01 23:33:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:33:17,689 INFO L495 AbstractCegarLoop]: Abstraction has 38818 states and 46735 transitions. [2023-04-01 23:33:17,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 49.75) internal successors, (597), 10 states have internal predecessors, (597), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:33:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 38818 states and 46735 transitions. [2023-04-01 23:33:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-04-01 23:33:17,702 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:33:17,702 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:33:17,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:33:17,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:33:17,903 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:33:17,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:33:17,903 INFO L85 PathProgramCache]: Analyzing trace with hash 505060739, now seen corresponding path program 1 times [2023-04-01 23:33:17,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:33:17,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732712069] [2023-04-01 23:33:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:33:17,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:33:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:18,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:33:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:18,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:33:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:18,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:33:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:18,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-04-01 23:33:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 23:33:18,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:33:18,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732712069] [2023-04-01 23:33:18,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732712069] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:33:18,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061357283] [2023-04-01 23:33:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:33:18,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:33:18,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:33:18,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:33:18,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:33:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:33:18,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 23:33:18,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:33:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 23:33:19,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:33:20,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061357283] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:33:20,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:33:20,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-04-01 23:33:20,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334118102] [2023-04-01 23:33:20,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:33:20,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 23:33:20,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:33:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 23:33:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:33:20,741 INFO L87 Difference]: Start difference. First operand 38818 states and 46735 transitions. Second operand has 13 states, 13 states have (on average 47.84615384615385) internal successors, (622), 11 states have internal predecessors, (622), 5 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 23:33:25,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:28,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:30,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:34,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:38,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:42,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:44,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:46,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:48,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:51,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:54,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:33:57,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:00,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:02,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:04,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:06,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:08,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:10,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:12,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:15,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:17,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:19,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:21,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:24,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:26,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:28,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:30,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:32,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:35,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:37,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:39,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:45,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:48,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:50,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:52,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:54,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:57,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:34:59,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:35:01,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:35:04,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:35:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:35:04,720 INFO L93 Difference]: Finished difference Result 112632 states and 138554 transitions. [2023-04-01 23:35:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-04-01 23:35:04,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 47.84615384615385) internal successors, (622), 11 states have internal predecessors, (622), 5 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 371 [2023-04-01 23:35:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:35:05,010 INFO L225 Difference]: With dead ends: 112632 [2023-04-01 23:35:05,010 INFO L226 Difference]: Without dead ends: 72944 [2023-04-01 23:35:05,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 710 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1114, Invalid=6026, Unknown=0, NotChecked=0, Total=7140 [2023-04-01 23:35:05,052 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 7081 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 10799 mSolverCounterSat, 1328 mSolverCounterUnsat, 38 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7081 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 12165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1328 IncrementalHoareTripleChecker+Valid, 10799 IncrementalHoareTripleChecker+Invalid, 38 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:35:05,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7081 Valid, 866 Invalid, 12165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1328 Valid, 10799 Invalid, 38 Unknown, 0 Unchecked, 101.5s Time] [2023-04-01 23:35:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72944 states. [2023-04-01 23:35:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72944 to 70414. [2023-04-01 23:35:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70414 states, 69209 states have (on average 1.0856535999653225) internal successors, (75137), 69609 states have internal predecessors, (75137), 320 states have call successors, (320), 320 states have call predecessors, (320), 884 states have return successors, (8896), 484 states have call predecessors, (8896), 319 states have call successors, (8896) [2023-04-01 23:35:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70414 states to 70414 states and 84353 transitions. [2023-04-01 23:35:06,769 INFO L78 Accepts]: Start accepts. Automaton has 70414 states and 84353 transitions. Word has length 371 [2023-04-01 23:35:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:35:06,770 INFO L495 AbstractCegarLoop]: Abstraction has 70414 states and 84353 transitions. [2023-04-01 23:35:06,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 47.84615384615385) internal successors, (622), 11 states have internal predecessors, (622), 5 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 23:35:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 70414 states and 84353 transitions. [2023-04-01 23:35:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-04-01 23:35:06,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:35:06,803 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:35:06,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 23:35:07,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:35:07,009 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:35:07,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:35:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash 141273883, now seen corresponding path program 1 times [2023-04-01 23:35:07,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:35:07,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987051654] [2023-04-01 23:35:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:35:07,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:35:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:07,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:35:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:07,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:35:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:07,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:35:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:07,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 23:35:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:07,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2023-04-01 23:35:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 369 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-04-01 23:35:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:35:08,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987051654] [2023-04-01 23:35:08,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987051654] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:35:08,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875334537] [2023-04-01 23:35:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:35:08,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:35:08,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:35:08,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:35:08,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:35:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:08,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 23:35:08,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:35:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 440 proven. 96 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 23:35:08,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:35:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 218 proven. 159 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-04-01 23:35:09,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875334537] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:35:09,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:35:09,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 5] total 17 [2023-04-01 23:35:09,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682631224] [2023-04-01 23:35:09,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:35:09,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 23:35:09,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:35:09,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 23:35:09,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-04-01 23:35:09,815 INFO L87 Difference]: Start difference. First operand 70414 states and 84353 transitions. Second operand has 17 states, 17 states have (on average 52.588235294117645) internal successors, (894), 15 states have internal predecessors, (894), 7 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 23:35:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:35:28,342 INFO L93 Difference]: Finished difference Result 194451 states and 234253 transitions. [2023-04-01 23:35:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-04-01 23:35:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 52.588235294117645) internal successors, (894), 15 states have internal predecessors, (894), 7 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 509 [2023-04-01 23:35:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:35:28,825 INFO L225 Difference]: With dead ends: 194451 [2023-04-01 23:35:28,825 INFO L226 Difference]: Without dead ends: 123170 [2023-04-01 23:35:28,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 1111 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5128 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1505, Invalid=12775, Unknown=0, NotChecked=0, Total=14280 [2023-04-01 23:35:28,889 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 8931 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 20043 mSolverCounterSat, 1368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8931 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 21411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1368 IncrementalHoareTripleChecker+Valid, 20043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:35:28,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8931 Valid, 1605 Invalid, 21411 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1368 Valid, 20043 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2023-04-01 23:35:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123170 states. [2023-04-01 23:35:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123170 to 117446. [2023-04-01 23:35:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117446 states, 115528 states have (on average 1.064399972301087) internal successors, (122968), 116122 states have internal predecessors, (122968), 534 states have call successors, (534), 534 states have call predecessors, (534), 1383 states have return successors, (11257), 789 states have call predecessors, (11257), 533 states have call successors, (11257) [2023-04-01 23:35:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117446 states to 117446 states and 134759 transitions. [2023-04-01 23:35:30,935 INFO L78 Accepts]: Start accepts. Automaton has 117446 states and 134759 transitions. Word has length 509 [2023-04-01 23:35:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:35:30,936 INFO L495 AbstractCegarLoop]: Abstraction has 117446 states and 134759 transitions. [2023-04-01 23:35:30,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.588235294117645) internal successors, (894), 15 states have internal predecessors, (894), 7 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 23:35:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 117446 states and 134759 transitions. [2023-04-01 23:35:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2023-04-01 23:35:30,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:35:30,978 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:35:30,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 23:35:31,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:35:31,184 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:35:31,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:35:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1898822960, now seen corresponding path program 1 times [2023-04-01 23:35:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:35:31,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049835] [2023-04-01 23:35:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:35:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:35:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:31,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:35:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:31,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:35:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:31,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:35:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:31,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2023-04-01 23:35:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:31,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2023-04-01 23:35:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:31,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 511 [2023-04-01 23:35:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 352 proven. 158 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-04-01 23:35:32,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:35:32,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049835] [2023-04-01 23:35:32,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049835] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:35:32,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812158022] [2023-04-01 23:35:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:35:32,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:35:32,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:35:32,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:35:32,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:35:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:32,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:35:32,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:35:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 505 proven. 2 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2023-04-01 23:35:32,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:35:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 505 proven. 2 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2023-04-01 23:35:32,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812158022] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:35:32,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:35:32,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:35:32,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97711187] [2023-04-01 23:35:32,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:35:32,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:35:32,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:35:32,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:35:32,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:35:32,817 INFO L87 Difference]: Start difference. First operand 117446 states and 134759 transitions. Second operand has 11 states, 11 states have (on average 67.81818181818181) internal successors, (746), 9 states have internal predecessors, (746), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:35:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:35:40,287 INFO L93 Difference]: Finished difference Result 246749 states and 284358 transitions. [2023-04-01 23:35:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-01 23:35:40,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 67.81818181818181) internal successors, (746), 9 states have internal predecessors, (746), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 678 [2023-04-01 23:35:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:35:40,649 INFO L225 Difference]: With dead ends: 246749 [2023-04-01 23:35:40,649 INFO L226 Difference]: Without dead ends: 131488 [2023-04-01 23:35:40,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1437 GetRequests, 1392 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 23:35:40,789 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 3480 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 7479 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3480 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 8156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 7479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:35:40,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3480 Valid, 560 Invalid, 8156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 7479 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 23:35:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131488 states. [2023-04-01 23:35:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131488 to 127102. [2023-04-01 23:35:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127102 states, 125046 states have (on average 1.05968203701038) internal successors, (132509), 125679 states have internal predecessors, (132509), 578 states have call successors, (578), 578 states have call predecessors, (578), 1477 states have return successors, (11405), 844 states have call predecessors, (11405), 577 states have call successors, (11405) [2023-04-01 23:35:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127102 states to 127102 states and 144492 transitions. [2023-04-01 23:35:43,029 INFO L78 Accepts]: Start accepts. Automaton has 127102 states and 144492 transitions. Word has length 678 [2023-04-01 23:35:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:35:43,029 INFO L495 AbstractCegarLoop]: Abstraction has 127102 states and 144492 transitions. [2023-04-01 23:35:43,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.81818181818181) internal successors, (746), 9 states have internal predecessors, (746), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:35:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 127102 states and 144492 transitions. [2023-04-01 23:35:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 739 [2023-04-01 23:35:43,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:35:43,277 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:35:43,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 23:35:43,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 23:35:43,482 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:35:43,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:35:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash 371301745, now seen corresponding path program 1 times [2023-04-01 23:35:43,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:35:43,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240765558] [2023-04-01 23:35:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:35:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:35:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:44,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:35:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:44,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:35:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:44,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:35:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:44,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2023-04-01 23:35:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:44,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2023-04-01 23:35:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:44,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:35:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2023-04-01 23:35:44,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:35:44,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240765558] [2023-04-01 23:35:44,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240765558] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:35:44,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004129525] [2023-04-01 23:35:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:35:44,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:35:44,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:35:44,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:35:44,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:35:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:44,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:35:44,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:35:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2023-04-01 23:35:44,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:35:44,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004129525] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:35:44,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:35:44,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:35:44,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210197066] [2023-04-01 23:35:44,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:35:44,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:35:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:35:44,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:35:44,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:35:44,712 INFO L87 Difference]: Start difference. First operand 127102 states and 144492 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:35:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:35:47,025 INFO L93 Difference]: Finished difference Result 261141 states and 296950 transitions. [2023-04-01 23:35:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:35:47,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 738 [2023-04-01 23:35:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:35:47,437 INFO L225 Difference]: With dead ends: 261141 [2023-04-01 23:35:47,437 INFO L226 Difference]: Without dead ends: 135787 [2023-04-01 23:35:47,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:35:47,505 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 454 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:35:47,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 687 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 23:35:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135787 states. [2023-04-01 23:35:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135787 to 129719. [2023-04-01 23:35:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129719 states, 127634 states have (on average 1.0595060877195732) internal successors, (135229), 128270 states have internal predecessors, (135229), 590 states have call successors, (590), 590 states have call predecessors, (590), 1494 states have return successors, (11614), 858 states have call predecessors, (11614), 589 states have call successors, (11614) [2023-04-01 23:35:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129719 states to 129719 states and 147433 transitions. [2023-04-01 23:35:49,575 INFO L78 Accepts]: Start accepts. Automaton has 129719 states and 147433 transitions. Word has length 738 [2023-04-01 23:35:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:35:49,576 INFO L495 AbstractCegarLoop]: Abstraction has 129719 states and 147433 transitions. [2023-04-01 23:35:49,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:35:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 129719 states and 147433 transitions. [2023-04-01 23:35:49,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2023-04-01 23:35:49,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:35:49,661 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:35:49,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 23:35:49,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:35:49,867 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:35:49,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:35:49,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1947844646, now seen corresponding path program 1 times [2023-04-01 23:35:49,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:35:49,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971550764] [2023-04-01 23:35:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:35:49,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:35:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:50,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:35:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:50,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:35:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:35:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:50,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2023-04-01 23:35:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:50,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2023-04-01 23:35:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:50,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:35:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:50,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 620 [2023-04-01 23:35:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:50,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 787 [2023-04-01 23:35:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 689 proven. 4 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2023-04-01 23:35:50,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:35:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971550764] [2023-04-01 23:35:50,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971550764] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:35:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232171671] [2023-04-01 23:35:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:35:50,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:35:50,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:35:50,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:35:50,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:35:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:35:51,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:35:51,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:35:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 681 proven. 2 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2023-04-01 23:35:51,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:35:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 681 proven. 2 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2023-04-01 23:35:51,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232171671] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:35:51,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:35:51,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:35:51,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57887203] [2023-04-01 23:35:51,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:35:51,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:35:51,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:35:51,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:35:51,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:35:51,753 INFO L87 Difference]: Start difference. First operand 129719 states and 147433 transitions. Second operand has 11 states, 11 states have (on average 72.9090909090909) internal successors, (802), 9 states have internal predecessors, (802), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 23:35:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:35:55,673 INFO L93 Difference]: Finished difference Result 256961 states and 292992 transitions. [2023-04-01 23:35:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 23:35:55,674 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 72.9090909090909) internal successors, (802), 9 states have internal predecessors, (802), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 954 [2023-04-01 23:35:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:35:55,959 INFO L225 Difference]: With dead ends: 256961 [2023-04-01 23:35:55,959 INFO L226 Difference]: Without dead ends: 128555 [2023-04-01 23:35:56,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1947 GetRequests, 1927 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:35:56,049 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 1684 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 3577 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 3933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 3577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:35:56,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 243 Invalid, 3933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 3577 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 23:35:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128555 states. [2023-04-01 23:35:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128555 to 128399. [2023-04-01 23:35:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128399 states, 126334 states have (on average 1.0498598951984421) internal successors, (132633), 126965 states have internal predecessors, (132633), 584 states have call successors, (584), 584 states have call predecessors, (584), 1480 states have return successors, (9728), 849 states have call predecessors, (9728), 583 states have call successors, (9728) [2023-04-01 23:35:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128399 states to 128399 states and 142945 transitions. [2023-04-01 23:35:58,156 INFO L78 Accepts]: Start accepts. Automaton has 128399 states and 142945 transitions. Word has length 954 [2023-04-01 23:35:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:35:58,157 INFO L495 AbstractCegarLoop]: Abstraction has 128399 states and 142945 transitions. [2023-04-01 23:35:58,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 72.9090909090909) internal successors, (802), 9 states have internal predecessors, (802), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 23:35:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 128399 states and 142945 transitions. [2023-04-01 23:35:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2023-04-01 23:35:58,244 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:35:58,245 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:35:58,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:35:58,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:35:58,446 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:35:58,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:35:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1677960869, now seen corresponding path program 1 times [2023-04-01 23:35:58,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:35:58,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47040371] [2023-04-01 23:35:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:35:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:35:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat